A027507 First column of A027495.

1, 3, 27, 173, 2213, 1239065, 1178661599, 537440137205, 4498684093801517, 397866367316299082571, 521505356993412536753131, 132101530036167237378528466705275, 1271578712351105027090700191735899429869, 33189191375129970683761258266358875688948789

Offset

1,2

Links

Table of n, a(n) for n=1..14.

Formula

Numerators of sequence a[ 1, n ] in (a[ i, j ])^2 where a[ i, j ] = S(i, j)/BellNumber(i) if j<=i, 0 if j>i.

Crossrefs

Cf. A027495.

Sequence in context: A056361 A141442 A053932 * A297670 A220820 A370710

Adjacent sequences: A027504 A027505 A027506 * A027508 A027509 A027510

Keyword

nonn

Author

Olivier Gérard

Extensions

More terms from Sean A. Irvine, Nov 06 2019

Status

approved