|
|
A330659
|
|
The number of free polyiamonds with n cells on an order-7 triangular tiling of the hyperbolic plane.
|
|
3
|
|
|
1, 1, 1, 1, 3, 4, 12, 27, 78, 208, 637, 1870, 5797, 17866, 56237, 177573, 566904, 1818527, 5874180, 19065038
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,5
|
|
COMMENTS
|
This gives the number of polyforms with n cells in the hyperbolic tiling with Schläfli symbol {3,7}.
This sequence is computed from via program by Christian Sievers in the Code Golf Stack Exchange link.
|
|
LINKS
|
|
|
PROG
|
Several working programs are available via the Code Golf link.
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,more
|
|
AUTHOR
|
|
|
EXTENSIONS
|
a(11)-a(19) from Ed Wynn, Feb 14 2021
|
|
STATUS
|
approved
|
|
|
|