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A208983 Central terms of the triangle in A208101. 3

%I #11 Feb 03 2018 09:55:53

%S 1,2,3,14,20,110,154,910,1260,7752,10659,67298,92092,592020,807300,

%T 5259150,7152444,47071640,63882940,423830264,574221648,3834669566,

%U 5188082354,34834267234,47073334100,317506779800,428634152730,2902365981900,3914819231400

%N Central terms of the triangle in A208101.

%C a(2*n+1) = A126596(n).

%H Reinhard Zumkeller, <a href="/A208983/b208983.txt">Table of n, a(n) for n = 0..1000</a>

%t T[_, 0] = 1; T[n_, 1] := n; T[n_, n_] := T[n - 1, n - 2]; T[n_, k_] /; 1 < k < n := T[n, k] = T[n - 1, k] + T[n - 1, k - 2];

%t a[n_] := T[2n, n];

%t Table[a[n], {n, 0, 30}] (* _Jean-François Alcover_, Feb 03 2018, from A208101 *)

%o (Haskell)

%o a208983 n = a208101 (2 * n) n

%K nonn

%O 0,2

%A _Reinhard Zumkeller_, Mar 04 2012

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Last modified April 18 22:18 EDT 2024. Contains 371782 sequences. (Running on oeis4.)