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 A192257 #11 Aug 23 2025 02:52:45 %S A192257 0,8,35,163,538,1618,4362,11018,26327,60327,133532,287324,603692, %T A192257 1243044,2515419,5013979,9863110,19176814,36900470,70348470,132999135, %U A192257 249552143,465041880,861196248,1585696248,2904335648,5293714067,9605482003 %N A192257 1-sequence of reduction of (n^3) by x^2 -> x+1. %C A192257 See A192232 for definition of "k-sequence of reduction of [sequence] by [substitution]". %F A192257 Empirical g.f.: x^2*(8-5*x+36*x^2-19*x^3+12*x^4-x^5)/(1-x)/(1-x-x^2)^4. - _Colin Barker_, Feb 10 2012 %t A192257 (* See A192256. *) %Y A192257 Cf. A192232, A192256. %K A192257 nonn,changed %O A192257 1,2 %A A192257 _Clark Kimberling_, Jun 27 2011