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A010759
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Sum along upward diagonal of Pascal triangle from halfway point.
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3
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1, 1, 1, 2, 4, 7, 7, 14, 26, 46, 51, 97, 176, 309, 365, 674, 1204, 2098, 2587, 4685, 8273, 14323, 18228, 32551, 56967, 98086, 127921, 226007, 392688, 672959, 895103, 1568062, 2708322, 4622488, 6249235, 10871723, 18683233, 31775031, 43551364
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OFFSET
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0,4
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LINKS
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FORMULA
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a(n) = Sum_{k=floor((n+2)/4)..floor(n/2)} binomial(n - k, k). - Seiichi Manyama, Feb 10 2022
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PROG
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(PARI) a(n) = sum(k=(n+2)\4, n\2, binomial(n-k, k)); \\ Seiichi Manyama, Feb 10 2022
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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