document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=340326>Question 340326</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I can't understand  this sequence an+1= an + 3 a1=1<BR>\n" );
document.write( "the result would be 1 4 7 10 but how does it work </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #243845 by </B><A HREF=/tutors/aboutme.mpl?userid=Fombitz><B>Fombitz(32388)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Fombitz><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=Fombitz><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=243845\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a%28n%2B1%29=a%28n%29%2B3 ALIGN=MIDDLE  ALT=\"a%28n%2B1%29=a%28n%29%2B3\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a%281%29=1 ALIGN=MIDDLE  ALT=\"a%281%29=1\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a%282%29=a%281%29%2B3=1%2B3=4 ALIGN=MIDDLE  ALT=\"a%282%29=a%281%29%2B3=1%2B3=4\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a%283%29=a%282%29%2B3=4%2B3=7 ALIGN=MIDDLE  ALT=\"a%283%29=a%282%29%2B3=4%2B3=7\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a%284%29=a%283%29%2B3=7%2B3=10 ALIGN=MIDDLE  ALT=\"a%284%29=a%283%29%2B3=7%2B3=10\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "Each new value builds off of the previous value. </SPAN>\n" );
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