A293932 Number of circularly chained n-tuples of 3 X 3 alternating sign matrices.

20, 140, 3861, 7436

Offset

1,1

Links

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

Heuer, Dylan, Chelsey Morrow, Ben Noteboom, Sara Solhjem, Jessica Striker, and Corey Vorland. "Chained permutations and alternating sign matrices - Inspired by three-person chess." Discrete Mathematics 340, no. 12 (2017): 2732-2752. Also arXiv:1611.03387.

Crossrefs

Cf. A005130, A293178, A293179, A293180, A293930, A059475, A293931.

Sequence in context: A054389 A374161 A253003 * A071816 A263960 A190067

Adjacent sequences: A293929 A293930 A293931 * A293933 A293934 A293935

Keyword

nonn,more

Author

N. J. A. Sloane, Oct 19 2017

Status

approved