A257641 Central terms of triangle A103284.

1, 1, 3, 9, 30, 102, 352, 1240, 4443, 16112, 58900, 216727, 801880, 2982327, 11147622, 41854916, 157805863, 597307573, 2268487476, 8639848112, 32999949539, 126498330700, 485441076004, 1865211479514, 7176111235446, 27644828367182, 106633724636570

Offset: 0

Author

Reinhard Zumkeller, Nov 19 2015

Keywords

• nonn

Comments

a(n) = A103284(2*n,n).

Links

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

Crossrefs

Cf. A103284, A103285, A000984.

Programs

Haskell

a257641 n = a103284 (2 * n) n