OFFSET
1,2
LINKS
J.-M. Sixdeniers, K. A. Penson and A. I. Solomon, Extended Bell and Stirling Numbers From Hypergeometric Exponentiation, J. Integer Seqs. Vol. 4 (2001), #01.1.4.
FORMULA
a(n) = (n+1)!^2*(n+1)n/8. - Oleksandr Kulkov, Oct 10 2022
MATHEMATICA
Table[((n+1)!)^2 (n+1) n/8, {n, 20}] (* Harvey P. Dale, Jul 25 2024 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jun 19 2001
EXTENSIONS
a(8)-a(16) from Alois P. Heinz, Sep 10 2019
STATUS
approved