|
|
A333018
|
|
Number of free heptagonal polyforms with n cells on the heptagonal tiling of the hyperbolic plane.
|
|
1
|
|
|
1, 1, 1, 3, 10, 44, 249, 1513, 9992, 68305, 480748, 3450793, 25186583
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,4
|
|
COMMENTS
|
The heptagonal tiling is represented by Schläfli symbol {7,3}.
This sequence is computed from via program by Christian Sievers in the Code Golf Stack Exchange link.
|
|
LINKS
|
|
|
PROG
|
Several programs are available via the Code Golf link.
|
|
CROSSREFS
|
Analogs with different Schläfli symbols are A000105 ({4,4}), A000207 ({3,oo}), A000228 ({6,3}), A000577 ({3,6}), A005036 ({4,oo}), A119611 ({4,5}), A330659 ({3,7}), and A332930 ({4,6}).
|
|
KEYWORD
|
nonn,more,hard
|
|
AUTHOR
|
|
|
EXTENSIONS
|
a(9)-a(12) from Ed Wynn, Feb 14 2021
|
|
STATUS
|
approved
|
|
|
|