Search: id:A115285
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%I A115285
%S A115285 1,3,7,14,23,35,50,67,87,110,135,163,194,227,263,302,343,387,434,483,
%T A115285 535,590,647,707,770,835,903,974,1047,1123,1202,1283,1367,1454,1543,
%U A115285 1635,1730,1827,1927,2030,2135,2243,2354,2467,2583,2702,2823,2947,3074
%N A115285 Diagonal sums of correlation triangle for 1,3,4,4,4,...(A113311).
%C A115285 Diagonal sums of number triangle A115284.
%F A115285 G.f.: (1+x)^2*(1+x^2)^2/((1-x)(1-x^2)(1-x^3)); a(n)=sum{k=0..floor(n/
               2), sum{j=0..n-k [j<=k]*(4-C(1, k-j)-2C(0, k-j))*[j<=n-2k]*((4-C(1, 
               n-2k-j)-2C(0, n-2k-j))}}.
%Y A115285 Sequence in context: A154772 A156859 A146931 this_sequence A004232 A140462 
               A093523
%Y A115285 Adjacent sequences: A115282 A115283 A115284 this_sequence A115286 A115287 
               A115288
%K A115285 easy,nonn
%O A115285 0,2
%A A115285 Paul Barry (pbarry(AT)wit.ie), Jan 19 2006

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