A027505 Second diagonal of A027497.

15, 609, 1920, 392486, 113377876875, 155741745023280000, 6605216052044829651068, 62870654640959433925847207524, 21721105002949781819252278922169473422080

Offset

2,1

Links

Table of n, a(n) for n=2..10.

Formula

Numerators of sequence a[ n, n-1 ] in (a[ i, j ])^4 where a[ i, j ] = S(i, j)/BellNumber(i) if j<=i, 0 if j>i

Crossrefs

Sequence in context: A276489 A243227 A215899 * A012210 A203172 A081022

Adjacent sequences: A027502 A027503 A027504 * A027506 A027507 A027508

Keyword

nonn

Author

Olivier Gérard

Status

approved