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 A087329 #27 Mar 18 2024 12:53:17 %S A087329 1,3,3,4,7,9,12,15,19,22,25,28,37,40,46,51,61,66,71,76,91,96,103,111, %T A087329 127 %N A087329 Independence numbers for KT_4 knight on hexagonal board. %H A087329 J.-P. Bode and H. Harborth, <a href="https://doi.org/10.1016/S0012-365X(03)00181-X">Independence for knights on hexagon and triangle boards</a>, Discrete Math., 272 (2003), 27-35. %H A087329 Andy Huchala, <a href="/A087329/a087329_1.py.txt">Python program</a>. %F A087329 a(4*n+1) = 3*n^2 + 3*n + 1 = A003215(n) from Bode and Harborth. - _Andy Huchala_, Mar 16 2024 %Y A087329 Cf. A003215, A087327, A087328. %K A087329 nonn,more %O A087329 1,2 %A A087329 _N. J. A. Sloane_, Oct 21 2003 %E A087329 a(17)-a(25) from _Andy Huchala_, Mar 16 2024