A199581 Central terms of the triangle in A199333: a(n) = A199333(2*n,n).

1, 2, 7, 29, 107, 431, 1619, 6079, 22937, 87083, 332393, 1273541, 4896103, 18877711, 72968563, 282664351, 1097088989, 4265342057, 16608401041, 64758466127, 252814859149, 988089813541, 3865761355523, 15138431958437, 59333638261529, 232737382916429

Offset

0,2

Comments

a(n) = A199582(2*n).

Links

Reinhard Zumkeller, Table of n, a(n) for n = 0..75

Prog

(Haskell)
a199581 n = a199333_row (2*n) !! n

Crossrefs

Cf. A000984, A199333, A199582.

Sequence in context: A261182 A155186 A203969 * A289609 A278815 A263367

Adjacent sequences: A199578 A199579 A199580 * A199582 A199583 A199584

Keyword

nonn

Author

Reinhard Zumkeller, Nov 09 2011

Status

approved