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A032297 "EFJ" (unordered, size, labeled) transform of 2,2,2,2,... 3

%I #8 Sep 11 2018 17:02:00

%S 1,2,2,14,18,62,566,1094,3954,17150,242982,573014,2717094,11553622,

%T 74420950,1427746334,4237820914,22743623742,116389345094,709019767190,

%U 5556385327158,152916116876390,524244823214950,3357960498345390,18667422415920486,129591208469013462

%N "EFJ" (unordered, size, labeled) transform of 2,2,2,2,...

%H Andrew Howroyd, <a href="/A032297/b032297.txt">Table of n, a(n) for n = 0..200</a>

%H C. G. Bower, <a href="/transforms2.html">Transforms (2)</a>

%F E.g.f.: Product_{k > 0} (1 + 2*x^k/k!). - _Andrew Howroyd_, Sep 11 2018

%o (PARI) seq(n)={Vec(serlaplace(prod(k=1, n, 1 + 2*x^k/k! + O(x*x^n))))} \\ _Andrew Howroyd_, Sep 11 2018

%K nonn

%O 0,2

%A _Christian G. Bower_

%E a(0)=1 prepended and terms a(23) and beyond from _Andrew Howroyd_, Sep 11 2018

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Last modified April 24 17:51 EDT 2024. Contains 371962 sequences. (Running on oeis4.)