A027483 Second subdiagonal of triangle A027478, constructed from the Stirling numbers of the first kind.

176, 2951, 22535, 112435, 426475, 1333906, 3614226, 8762370, 19439970, 40113425, 77924561, 143844701, 254168005, 432404980, 711642100, 1137438516, 1771335876, 2695062315, 4015516715, 5870624375, 8436160271, 11933641126, 16639392550, 22894902550, 31118577750

Offset

3,1

Links

Table of n, a(n) for n=3..27.

Formula

a(n) = A027478(n,n+2).

Conjectures from Chai Wah Wu, May 07 2025: (Start)

a(n) = 9*a(n-1) - 36*a(n-2) + 84*a(n-3) - 126*a(n-4) + 126*a(n-5) - 84*a(n-6) + 36*a(n-7) - 9*a(n-8) + a(n-9) for n > 11.

G.f.: x^3*(x^5 + 112*x^4 + 1072*x^3 + 2312*x^2 + 1367*x + 176)/(1 - x)^9. (End)

Crossrefs

Cf. A027478.

Sequence in context: A223611 A290703 A077742 * A243647 A220919 A221635

Adjacent sequences: A027480 A027481 A027482 * A027484 A027485 A027486

Keyword

nonn,easy

Author

Olivier Gérard

Extensions

More terms from Sean A. Irvine, Nov 06 2019

Status

approved