A066865 Number of binary arrangements without adjacent 1's on n X n staggered hexagonal torus bent for odd n.
1, 5, 22, 217, 4726, 164258, 14840533, 1834600977, 669877863205, 296979228487760, 434542100979981567, 692625866382651263578, 4053364289624915167879497, 23237986479606982160703729647, 543749373021017146939376423644362, 11213018647250714014261414954480048385
Offset: 1
Keywords
Examples
Neighbors for n=4: \|/ | \|/ | -o--o--o--o- | /|\ | /|\ \|/ | \|/ | -o--o--o--o- | /|\ | /|\ \|/ | \|/ | -o--o--o--o- | /|\ | /|\ \|/ | \|/ | -o--o--o--o- | /|\ | /|\ Neighbors for n=5: \|/ | \|/ | \|/ o--o--o--o--o /| /|\ | /|\ |\ \|/ | \|/ | \|/ o--o--o--o--o /| /|\ | /|\ |\ \|/ | \|/ | \|/ o--o--o--o--o /| /|\ | /|\ |\ \|/ | \|/ | \|/ o--o--o--o--o /| /|\ | /|\ |\ \|/ | \|/ | \|/ o--o--o--o--o /| /|\ | /|\ |\
References
- Steven R. Finch, Mathematical Constants, Cambridge, 2003, pp. 342-349.
- J. Katzenelson and R. P. Kurshan, S/R: A Language for Specifying Protocols and Other Coordinating Processes, pp. 286-292 in Proc. IEEE Conf. Comput. Comm., 1986.
Links
- Steven R. Finch, Hard Square Entropy Constant [Broken link]
- Steven R. Finch, Hard Square Entropy Constant [From the Wayback machine]
Crossrefs
Extensions
More terms from Sean A. Irvine, Nov 18 2023