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A102428
Central column of triangle A102427.
3
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
0,2
FORMULA
a(n) = binomial(floor((5*n+2)/2), floor((n+1)/2)). - David Wasserman, Apr 04 2008
MATHEMATICA
Table[Binomial[Floor[(5n+2)/2], Floor[(n+1)/2]], {n, 0, 30}] (* Harvey P. Dale, Mar 13 2015 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Russell Walsmith, Jan 11 2005
EXTENSIONS
More terms from David Wasserman, Apr 04 2008
STATUS
approved