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 A077832 #8 May 21 2018 15:09:39 %S A077832 1,2,7,23,73,236,760,2447,7882,25385,81757,263315,848056,2731328, %T A077832 8796769,28331690,91247671,293880719,946499521,3048384212,9817909144, %U A077832 31620469487,101839819042,327994773977,1056370413541,3402244606139,10957584774832,35291014608704 %N A077832 Expansion of 1/(1-2*x-3*x^2-3*x^3). %H A077832 <a href="/index/Rec#order_03">Index entries for linear recurrences with constant coefficients</a>, signature (2,3,3). %o A077832 (PARI) Vec(1/(1-2*x-3*x^2-3*x^3)+O(x^99)) \\ _Charles R Greathouse IV_, Sep 27 2012 %Y A077832 Partial sums of S(n, x), x=1..17 see A077831 with links. Partial sums of S(n, 18) see A049664. %K A077832 nonn,easy %O A077832 0,2 %A A077832 _N. J. A. Sloane_, Nov 17 2002