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 A044045 #18 Feb 16 2025 08:32:38 %S A044045 0,1,2,6,19,71,274,1117,4650,19819,85710,375712,1664203,7439593, %T A044045 33515758,152019560,693625265,3181528275,14661581030,67850297506, %U A044045 315187646601,1469195636293,6869889703638,32215399021901,151467334017864,713881817440421,3372142139764434 %N A044045 Same as A038392 except for initial term. %H A044045 B. N. Cyvin, E. Brendsdal, J. Brunvoll, S. J. Cyvin, <a href="http://dx.doi.org/10.1007/BF00811082">A class of polygonal systems representing polycyclic conjugated hydrocarbons: Catacondensed monoheptafusenes</a>, Monat. f. Chemie, 125 (1994), 1327-1337. %H A044045 S. J. Cyvin, B. N. Cyvin, J. Brunvoll and E. Brendsdal, <a href="https://doi.org/10.1021/ci00021a026">Enumeration and Classification of Certain Polygonal Systems Representing Polycyclic Conjugated Hydrocarbons: Annelated Catafusenes</a>, Journal of Chemical Information and Modeling [formerly, J. Chem. Inform. Comput. Sci.], 34 (1994), pp. 1174-1180. %H A044045 F. Harary and R. C. Read, <a href="https://doi.org/10.1017/S0013091500009135">The enumeration of tree-like polyhexes</a>, Proc. Edinburgh Math. Soc. (2) 17 (1970), 1-13. %H A044045 Eric W. Weisstein, <a href="https://mathworld.wolfram.com/Fusene.html">Fusene</a>, MathWorld-A Wolfram Web Resource. %F A044045 G.f.: (2*(1-z)^2 - (1-z)*f(z) - f(z^2))/(4*z*(1-z)) where f(z) = sqrt(1 - 6z + 5z^2). - _Emeric Deutsch_, Mar 14 2004 %Y A044045 Cf. A121178. %K A044045 nonn %O A044045 0,3 %A A044045 _N. J. A. Sloane_ %E A044045 More terms from _Emeric Deutsch_, Mar 14 2004