A293930 Number of circularly chained n X n alternating sign matrices.

1, 2, 20, 40, 3430, 6860

Offset: 1

Author

N. J. A. Sloane, Oct 19 2017

Keywords

• nonn
• more

Links

• 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.