A208983 Central terms of the triangle in A208101.

1, 2, 3, 14, 20, 110, 154, 910, 1260, 7752, 10659, 67298, 92092, 592020, 807300, 5259150, 7152444, 47071640, 63882940, 423830264, 574221648, 3834669566, 5188082354, 34834267234, 47073334100, 317506779800, 428634152730, 2902365981900, 3914819231400

Offset: 0

Author

Reinhard Zumkeller, Mar 04 2012

Keywords

• nonn

Comments

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

Links

• Reinhard Zumkeller, Table of n, a(n) for n = 0..1000

Programs

Haskell

a208983 n = a208101 (2 * n) n

Mathematica

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];
a[n_] := T[2n, n];
Table[a[n], {n, 0, 30}] (* Jean-François Alcover, Feb 03 2018, from A208101 *)