A261048 Second column of the triangle A085843.

1, 4, 16, 67, 294, 1346, 6397, 31405, 158531, 819438, 4321316, 23176629, 126086986, 694259790, 3862070512, 21673114457, 122545849017, 697461040394, 3992357941495, 22968483183300, 132734108621190, 770146656686400, 4484664208897710, 26200077885755587

Offset

1,2

Links

Table of n, a(n) for n=1..24.

Formula

a(n) = A085843(n,1).

2*n *(8*n-77) *(2*n+3) *(n+1)*a(n) +n*(32*n^3 +7345*n^2 -4387*n -4370)*a(n-1) +2*(-2421*n^4 -27323*n^3 +119441*n^2 -126867*n +34410)*a(n-2) +4*(2*n-5) *(3626*n^3 +23472*n^2 -131091*n +126798)*a(n-3) -200*(n-3) *(61*n+547) *(2*n-5) *(2*n-7)*a(n-4)=0. - R. J. Mathar, Aug 08 2015

Crossrefs

Cf. A085843.

Sequence in context: A273582 A183275 A024551 * A091153 A270765 A292759

Adjacent sequences: A261045 A261046 A261047 * A261049 A261050 A261051

Keyword

nonn

Author

R. J. Mathar, Aug 08 2015

Status

approved