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 A256047 #16 Jan 04 2025 07:33:23 %S A256047 8,52,272,73124 %N A256047 a(n) = A256046(2n+1): order of all-2s configuration on the (2n+1) X (2n+1) sandpile grid graph. %H A256047 Laura Florescu, Daniela Morar, David Perkinson, Nicholas Salter, and Tianyuan Xu, <a href="https://doi.org/10.37236/4472">Sandpiles and Dominos</a>, Electronic Journal of Combinatorics, Volume 22(1), 2015. %Y A256047 C. A256045, A256046, A256043. %K A256047 nonn,more %O A256047 1,1 %A A256047 _N. J. A. Sloane_, Mar 15 2015 %E A256047 Definition corrected by _M. F. Hasler_, Mar 08 2018