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URL: https://oeis.org/A241581

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A241581
Row sums in triangle A241580.
4
1, 1, 8, 54, 584, 7350, 114162, 2053688, 42513984, 991883610, 25807006730, 740614555692, 23250961252752, 792694751381078, 29169262097277330, 1152329533163353680, 48645406703597457152, 2185462919071085059890, 104113841197940277430554, 5242449827954998459195220
OFFSET
1,3
FORMULA
a(n) = (n^n-A241580(n+1,1))/n.
a(n) = A245687(n,1)/n. - Alois P. Heinz, Jul 29 2014
MAPLE
M:=20;
T[1, 1]:=1:
for n from 2 to M do
T[n, n]:=(n-1)^(n-1);
for k from n-1 by -1 to 1 do
T[n, k]:=T[n, k+1]-(n-1)*T[n-1, k]:
od:
od:
f:=n->(n^n-T[n+1, 1])/n; [seq(f(n), n=1..M-1)];
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Apr 29 2014
STATUS
approved