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A121017 Stirling transform of A104600. 2

%I #18 Sep 03 2019 10:36:43

%S 1,1,6,65,1125,28132,950649,41475961,2259756900,149874308367,

%T 11858161118925,1101069785060610,118366544943589215,

%U 14564702419742606497,2031425158227034739646,318472106732688712103885,55708816671530680003669185,10803156636116962310987233404

%N Stirling transform of A104600.

%H Alois P. Heinz, <a href="/A121017/b121017.txt">Table of n, a(n) for n = 0..273</a>

%F a(n) = (1/(2e)) * Sum_{r,s >= 0} (r*s)^n / (2^r*s!).

%F a(n) = A000670(n)*A000110(n). - _Vladeta Jovovic_, Sep 27 2006

%p a:= n-> combinat[bell](n)*add(Stirling2(n, k)*k!, k=0..n): seq(a(n), n=0..19); # _Zerinvary Lajos_, Sep 30 2006

%Y Cf. A000110, A000670, A104600.

%Y Row sums of A323099.

%K easy,nonn

%O 0,3

%A _Vladeta Jovovic_, Sep 08 2006

%E More terms from _Zerinvary Lajos_, Sep 30 2006

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Last modified May 14 21:33 EDT 2024. Contains 372533 sequences. (Running on oeis4.)