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 A328079 #9 Oct 16 2019 16:16:11 %S A328079 1,1,2,4,6,12,21,43,78,156,293,583,1118,2208,4277,8423,16422,32280, %T A328079 63117,123951,242782,476560,934181,1833255,3595254,7054600,13837949, %U A328079 27151135,53264270,104505920,205027797,402264599,789215654 %N A328079 First differences of A328078. %F A328079 Conjecture: G.f. = (4*x^11-8*x^10+4*x^9+4*x^8-8*x^7+7*x^6-4*x^5-5*x^4+2*x^3-2*x^2+1) / ((x^2+1)*(2*x^2-1)*(4*x^7-4*x^6+4*x^4-2*x^3+2*x^2+x-1)). - _N. J. A. Sloane_, Oct 16 2019 %Y A328079 Cf. A328078. %K A328079 nonn,more %O A328079 0,3 %A A328079 _N. J. A. Sloane_, Oct 13 2019 %E A328079 a(8)-a(32) from Rémy Sigrist, Oct 15 2019