A124889 Central terms of triangle A124328; a(n) = A124328(2n+1,n+1) for n>=0.

1, 2, 9, 44, 235, 1296, 7329, 42104, 244719, 1434840, 8470517, 50280372, 299806572, 1794382548, 10773855210, 64865425760, 391457133672, 2367314649522, 14342441005900, 87035702613500, 528938145043707, 3218713327609648

Offset

0,2

Links

Table of n, a(n) for n=0..21.

Formula

a(n) = (n+1)*A124890(n).

Crossrefs

Cf. A124328, A124889, A124890, A124891.

Sequence in context: A339440 A026302 A214460 * A317134 A295809 A229189

Adjacent sequences: A124886 A124887 A124888 * A124890 A124891 A124892

Keyword

nonn

Author

Paul D. Hanna, Nov 12 2006

Status

approved