A256047 a(n) = A256046(2n+1): order of all-2s configuration on the (2n+1) X (2n+1) sandpile grid graph.

8, 52, 272, 73124

Offset

1,1

Links

Table of n, a(n) for n=1..4.

Laura Florescu, Daniela Morar, David Perkinson, Nicholas Salter, and Tianyuan Xu, Sandpiles and Dominos, Electronic Journal of Combinatorics, Volume 22(1), 2015.

Crossrefs

C. A256045, A256046, A256043.

Sequence in context: A055283 A193427 A022732 * A227732 A000432 A153336

Adjacent sequences: A256044 A256045 A256046 * A256048 A256049 A256050

Keyword

nonn,more

Author

N. J. A. Sloane, Mar 15 2015

Extensions

Definition corrected by M. F. Hasler, Mar 08 2018

Status

approved