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

0,3

Comments

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

Links

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

Prog

(Haskell)
a257641 n = a103284 (2 * n) n

Crossrefs

Cf. A103284, A103285, A000984.

Sequence in context: A148947 A090573 A228339 * A048119 A304823 A394948

Adjacent sequences: A257638 A257639 A257640 * A257642 A257643 A257644

Keyword

nonn

Author

Reinhard Zumkeller, Nov 19 2015

Status

approved