A027525 First diagonal of A027518.

1, 1, 8, 54, 13500, 3087000, 3652264, 1157625, 456533, 166375, 4492125, 1728000, 394444512000, 240827600093696, 869479900246125, 384557787648000, 90468670208000, 83064482131968, 13819853214706176, 45242839158999552000, 22447962513858357000

Offset

1,3

Links

Table of n, a(n) for n=1..21.

Formula

Numerators of sequence a[n, n] in A=(b[i, j])^4 where b[i, j] = A008284(i, j) / Partitions(i) if j<=i, 0 if j>i.

Crossrefs

Sequence in context: A241581 A052690 A304589 * A298654 A080312 A116885

Adjacent sequences: A027522 A027523 A027524 * A027526 A027527 A027528

Keyword

nonn

Author

Olivier Gérard

Status

approved