%I #12 Mar 18 2018 08:54:06
%S 8,52,272,73124
%N a(n) = A256046(2n+1): order of all-2s configuration on the (2n+1) X (2n+1) sandpile grid graph.
%H Laura Florescu, Daniela Morar, David Perkinson, Nicholas Salter, Tianyuan Xu, <a href="http://www.combinatorics.org/ojs/index.php/eljc/article/view/v22i1p66">Sandpiles and Dominos</a>, Electronic Journal of Combinatorics, Volume 22(1), 2015.
%Y C. A256045, A256046, A256043.
%K nonn,more
%O 1,1
%A _N. J. A. Sloane_, Mar 15 2015
%E Definition corrected by _M. F. Hasler_, Mar 08 2018