This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A167385 #2 Mar 30 2012 17:34:35 %S A167385 1,3,5,8,12,17,24,33,45,61,82,110,147,196,261,347,461,612,812,1077, %T A167385 1428,1893,2509,3325,4406,5838,7735,10248,13577,17987,23829,31568, %U A167385 41820,55401,73392,97225,128797,170621,226026,299422,396651,525452,696077,922107,1221533 %N A167385 a(n)= sum_{i=7..n+6} A000931(i). %F A167385 a(n+1)/a(n)-> A060005 as n->infinity. %F A167385 G.f.: (1+x)^2/((x-1)*(x^3+x^2-1)). a(n)= +a(n-1) +a(n-2) -a(n-4). [Nov 05 2009] %F A167385 a(n) = A000931(n+12)-4. [Nov 05 2009] %t A167385 Clear[f, g, n] %t A167385 f[0] = 0; f[1] = 1; f[2] = 1; f[n_] := f[n] = f[n - 2] + f[n - 3]; %t A167385 g[n_] := Sum[f[i + 3], {i, 0, n}] %t A167385 Table[g[n], {n, 0, 30}] %Y A167385 Cf. A018917. %K A167385 nonn,easy %O A167385 0,2 %A A167385 _Roger L. Bagula_, Nov 02 2009 %E A167385 Notation normalized, definition corrected, g.f. added - The Assoc. Editors of the OEIS, Nov 05 2009