A102428 Central column of triangle A102427.

1, 3, 6, 28, 55, 286, 560, 3060, 5985, 33649, 65780, 376740, 736281, 4272048, 8347680, 48903492, 95548245, 563921995, 1101716330, 6540715896, 12777711870, 76223753060, 148902215280, 891794789340, 1742058970275, 10468434365991

Offset: 0

Author

Russell Walsmith, Jan 11 2005

Keywords

• nonn

Crossrefs

Cf. A011973, A102426, A102427, A102429.

Programs

Mathematica

Table[Binomial[Floor[(5n+2)/2],Floor[(n+1)/2]],{n,0,30}] (* Harvey P. Dale, Mar 13 2015 *)

Formula

a(n) = binomial(floor((5*n+2)/2), floor((n+1)/2)). - David Wasserman, Apr 04 2008

Extensions

More terms from David Wasserman, Apr 04 2008