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 A000649 M3958 N1633 #20 Feb 01 2022 01:07:58
%S A000649 1,5,30,115,425,1396,4440,13470,40000,116140,332827,942435,2647450,
%T A000649 7386925,20511620,56731383,156451985,430462915,1182341890,3243215495,
%U A000649 8887664047,24338341165,66616422775,182276901760,498657609720,1364083988834
%N A000649 Number of alkyls C_{n+15} H_{2n+10} (Phenan) with n carbon atoms.
%D A000649 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
%D A000649 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%H A000649 G. Polya, <a href="http://dx.doi.org/10.1524/zkri.1936.93.1.415">Algebraische Berechnung der Anzahl der Isomeren einiger organischer Verbindungen</a>, Zeit. f. Kristall., 93 (1936), 415-443; line 16 of Table I.
%H A000649 G. Polya, <a href="/A000598/a000598_3.pdf">Algebraische Berechnung der Anzahl der Isomeren einiger organischer Verbindungen</a>, Zeit. f. Kristall., 93 (1936), 415-443; Table I, line 16. (Annotated scanned copy)
%F A000649 G.f.: A(x) = (r(x)^10+r(x^2)^5)/2, r(x) = A000598(x).
%Y A000649 Cf. A000648.
%K A000649 nonn,easy
%O A000649 0,2
%A A000649 _N. J. A. Sloane_