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A047087 a(n) = A047080(2n,n+1). 3

%I

%S 1,3,8,24,75,237,755,2421,7804,25264,82081,267487,873970,2862038,

%T 9391137,30869167,101627704,335049772,1106003560,3655124296,

%U 12092095945,40042017815,132712302538,440207294382,1461259979347,4853983051617,16134233746913,53660996850207

%N a(n) = A047080(2n,n+1).

%Y Cf. A047080, A047085, A047086, A047088.

%K nonn

%O 1,2

%A _Clark Kimberling_

%E Corrected and extended by _Sean A. Irvine_, May 11 2021

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Last modified May 19 17:44 EDT 2022. Contains 353847 sequences. (Running on oeis4.)