VOOZH about

URL: https://oeis.org/A157504

⇱ A157504 - OEIS

login
A157504
a(n) = A157503(n)/n for n > 0 with a(0) = 1.
1
1, -1, -2, -7, -40, -301, -2856, -32299, -416816, -5892345, -86464000, -1177909711, -8944121088, 349846341467, 29237270702080, 1585383533246925, 78578098584541184, 3843296406581515919, 190784066705549623296, 9732102939404871092585, 513169782239887360000000, 28048857319579236657396579
OFFSET
0,3
MATHEMATICA
A157503[n_]:=n!*SeriesCoefficient[Det[Table[KroneckerDelta[j, k]- (j*x)^k/k!, {j, 1, n}, {k, 1, n}]], {x, 0, n}]; a[n_]:=A157503[n]/n; Join[{1}, Array[a, 20]] (* Stefano Spezia, Dec 03 2025 *)
CROSSREFS
Cf. A157503.
Sequence in context: A069732 A346964 A277565 * A093985 A308876 A361597
KEYWORD
easy,sign
AUTHOR
Andrew J. Robbins, Mar 02 2009
EXTENSIONS
Name corrected by Stefano Spezia, Dec 03 2025
a(0) prepended by and more terms from Stefano Spezia, Dec 03 2025
STATUS
approved