document.write( "Question 1085216: For the sequence 1,6,20,56,..., what is an? \n" ); document.write( "
Algebra.Com's Answer #699292 by AnlytcPhil(1806)\"\" \"About 
You can put this solution on YOUR website!
\r\n" );
document.write( "\r\n" );
document.write( "1,6,20,56,....\r\n" );
document.write( "\r\n" );
document.write( "That's\r\n" );
document.write( "\r\n" );
document.write( "1×1, 2×3, 4×5, 8×7, 16*9, ...\r\n" );
document.write( "\r\n" );
document.write( "an = 2n-1(2n-1)\r\n" );
document.write( "\r\n" );
document.write( "Edwin
\n" ); document.write( "
\n" );