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A010755
Sum along upward diagonal of Pascal triangle up to (but not including) halfway point.
3
0, 0, 1, 1, 1, 1, 6, 7, 8, 9, 38, 47, 57, 68, 245, 313, 393, 486, 1594, 2080, 2673, 3388, 10429, 13817, 18058, 23307, 68497, 91804, 121541, 159081, 451166, 610247, 816256, 1080399, 2978230, 4058629, 5474584, 7313138, 19694622, 27007760, 36687377
OFFSET
0,7
LINKS
FORMULA
a(n) = Sum_{k=0..floor((n-2)/4)} binomial(n - k, k). - Seiichi Manyama, Feb 10 2022
PROG
(PARI) a(n) = sum(k=0, (n-2)\4, binomial(n-k, k)); \\ Seiichi Manyama, Feb 10 2022
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved