OFFSET
1,2
LINKS
G. C. Greubel, Table of n, a(n) for n = 1..380
MATHEMATICA
Table[(n-1)!*Sum[Floor[k^k/k!], {k, n}], {n, 20}] (* G. C. Greubel, Jul 31 2019 *)
PROG
(PARI) vector(20, n, (n-1)!*sum(k=1, n, k^k\k!)) \\ G. C. Greubel, Jul 31 2019
(Magma) F:=Factorial; [F(n-1)*(&+[Floor(k^k/F(k)): k in [1..n]]): n in [1..20]]; // G. C. Greubel, Jul 31 2019
(Sage) f=factorial; [f(n-1)*sum(floor(k^k/f(k)) for k in (1..n)) for n in (1..20)] # G. C. Greubel, Jul 31 2019
(GAP) F:=Factorial;; List([1..20], n-> F(n-1)*Sum([1..n], k-> Int(k^k/F(k)) )); # G. C. Greubel, Jul 31 2019
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Apr 29 2000
STATUS
approved