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 A005963 M1969 #13 Jul 08 2025 16:40:01 %S A005963 0,0,1,2,10,45,210,1002,4883,23797,116518,571471 %N A005963 Number of restricted hexagonal polyominoes with n cells. %D A005963 A. T. Balaban, Enumeration of Cyclic Graphs, pp. 63-105 of A. T. Balaban, ed., Chemical Applications of Graph Theory, Ac. Press, 1976; see p. 75. %D A005963 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %Y A005963 Equals A000228 - A002216. %Y A005963 Cf. A036359, A002216, A005963, A000228, A001998. %K A005963 nonn %O A005963 1,4 %A A005963 _N. J. A. Sloane_