A160647 Self-convolution of sequence A001402.

1, 2, 5, 10, 20, 36, 65, 108, 179, 284, 445, 676, 1017, 1492, 2168, 3094, 4372, 6088, 8406, 11462, 15509, 20770, 27614, 36390, 47646, 61898, 79939, 102538, 130808, 165864, 209272, 262598, 328008, 407700, 504607, 621760, 763123, 932788, 1136047

Offset: 1

Author

Alford Arnold, May 27 2009

Keywords

• easy
• nonn

Examples

			a(8) = 108 because the eighth antidiagonal of the associated array is 14 11 14 15 15 14 11 14 and sums to 108.
		

Crossrefs

Cf. A117566.

Sixth in a list of sequences related to numeric partitions; earlier sequences are A000027, A006918, A117485, A117486, and A117487.

Programs

Maple

A160647 := proc(n) coeftayl( convert(1/mul((1-x^j)^2,j=1..6),parfrac,x),x=0,n) ; end: seq(A160647(n),n=0..45) ; # R. J. Mathar, Jun 16 2009

Extensions

More terms from R. J. Mathar, Jun 16 2009