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A208147 Sequence generated from A089080. 3

%I #12 Dec 11 2023 18:43:45

%S 1,2,6,12,48,96,288,576,2880,5760,17280,34560,138240,276480,829440,

%T 1658880,9953280,19906560,59719680,119439360,477757440,955514880,

%U 2866544640,5733089280,28665446400,57330892800,171992678400,343985356800,1375941427200,2751882854400

%N Sequence generated from A089080.

%H Alois P. Heinz, <a href="/A208147/b208147.txt">Table of n, a(n) for n = 1..2268</a>

%F a(1) = 1; a(n), n>1 = A089080(n) * a(n-1) with A089080 = (1, 2, 3, 2, 4, 2, 3, 2,...)

%F a(n) = (2*n-1)!/A067281(2*n-1). - _Alois P. Heinz_, Dec 11 2023

%e a(5) = 48 = A089080(5) * a(4) = 4 * 12.

%Y Cf. A000142, A067281, A089080.

%K nonn,easy

%O 1,2

%A _Gary W. Adamson_, Feb 23 2012

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Last modified March 29 04:23 EDT 2024. Contains 371264 sequences. (Running on oeis4.)