|
%I #15 Feb 10 2022 08:43:22
%S 1,1,1,2,4,7,7,14,26,46,51,97,176,309,365,674,1204,2098,2587,4685,
%T 8273,14323,18228,32551,56967,98086,127921,226007,392688,672959,
%U 895103,1568062,2708322,4622488,6249235,10871723,18683233,31775031,43551364
%N Sum along upward diagonal of Pascal triangle from halfway point.
%H Seiichi Manyama, <a href="/A010759/b010759.txt">Table of n, a(n) for n = 0..1000</a>
%F a(n) = Sum_{k=floor((n+2)/4)..floor(n/2)} binomial(n - k, k). - _Seiichi Manyama_, Feb 10 2022
%o (PARI) a(n) = sum(k=(n+2)\4, n\2, binomial(n-k, k)); \\ _Seiichi Manyama_, Feb 10 2022
%Y Cf. A000045, A007318, A010754, A010755, A010758.
%K nonn
%O 0,4
%A _R. K. Guy_
|
