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 A307545 #5 Apr 14 2019 11:55:31 %S A307545 1,1,4,8,17,36,76,160,338,714,1508,3184,6723,14196,29976,63296,133653, %T A307545 282217,595920,1258324,2657032,5610494,11846920,25015536,52821917, %U A307545 111536883,235517320,497310008,1050102149,2217358398,4682095232,9886545984,20876079330,44081187594,93080269957 %N A307545 G.f. A(x) satisfies: A(x) = 1/(1 - x^a(0) - x^a(1) - x^a(2) - x^a(3) - ...) - x. %e A307545 G.f.: A(x) = 1 + x + 4*x^2 + 8*x^3 + 17*x^4 + 36*x^5 + 76*x^6 + 160*x^7 + 338*x^8 + ... = 1/(1 - 2*x - x^4 - x^8 - x^17 - x^36 - x^76 - x^160 - x^338 - ...) - x. %Y A307545 Cf. A057601, A151945. %K A307545 nonn %O A307545 0,3 %A A307545 _Ilya Gutkovskiy_, Apr 14 2019