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A010754
Sum along upward diagonal of Pascal triangle to halfway point.
4
1, 1, 1, 1, 4, 5, 6, 7, 23, 30, 38, 47, 141, 188, 245, 313, 888, 1201, 1594, 2080, 5676, 7756, 10429, 13817, 36622, 50439, 68497, 91804, 237821, 329625, 451166, 610247, 1551727, 2161974, 2978230, 4058629, 10161409, 14220038, 19694622, 27007760, 66732392
OFFSET
0,5
LINKS
FORMULA
a(n) = Sum_{k=0..floor(n/4)} binomial(n - k, k). - Sean A. Irvine, Jun 08 2018
CROSSREFS
Sequence in context: A030667 A030677 A071177 * A187807 A051036 A063673
KEYWORD
nonn
AUTHOR
STATUS
approved