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 A007288 M2672 #11 Feb 16 2022 10:26:34 %S A007288 1,3,7,19,49,127,321,813,2041,5117,12763,31791,78917,195677,483997, %T A007288 1196081,2950439,7271905 %N A007288 Expansion of layer susceptibility series for square lattice. %D A007288 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %H A007288 I. G. Enting and A. J. Guttmann, <a href="https://doi.org/10.1088/0305-4470/13/3/037">The square lattice Ising model with a free surface</a>, J. Phys. A: Math. Gen. 13 (1980), 1043-1050. %H A007288 S. G. Whittington, G. M. Torrie and A. J. Guttmann, <a href="https://doi.org/10.1088/0305-4470/12/12/023">The Ising model with a free surface: a series analysis study</a>, J. Phys. A 12 (1979), 2449-2455. %Y A007288 Cf. A007287 (cubic). %K A007288 nonn,more %O A007288 0,2 %A A007288 _Simon Plouffe_ %E A007288 a(14) corrected, a(15)-a(17) from Enting & Guttmann added by _Andrey Zabolotskiy_, Feb 16 2022