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A111417 a(n) = A034869(n) - A008311(n). 0

%I

%S 0,0,1,0,0,0,3,0,0,0,0,0,10,0,0,0,0,0,0,0,35,0,0,0,0,0,0,0,0,0,126,0,

%T 0,0,0,0,0,0,0,0,0,0,462,0,0,0,0,0,0,0,0,0,0,0,0,0,1716,0,0,0,0,0,0,0,

%U 0,0,0,0,0,0,0,0,6435,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,24310,0

%N a(n) = A034869(n) - A008311(n).

%F a(n) = A001700(m) if n = (m+1)*(m+2) and a(n) = 0 otherwise.

%K easy,nonn

%O 0,7

%A _Philippe Deléham_, Nov 13 2005

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Last modified May 20 21:39 EDT 2022. Contains 353876 sequences. (Running on oeis4.)