document.write( "Question 530595: what will come after 1,3,9,31,129 \n" ); document.write( "
Algebra.Com's Answer #350173 by sudhanshu_kmr(1152)\"\" \"About 
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\n" ); document.write( "1*1+2 = 3\r
\n" ); document.write( "\n" ); document.write( "3*2+3 = 9\r
\n" ); document.write( "\n" ); document.write( "9*3+4 = 31\r
\n" ); document.write( "\n" ); document.write( "31*4 + 5 = 129 \r
\n" ); document.write( "\n" ); document.write( "129*5 + 6 = 651\r
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