OFFSET
2,2
LINKS
Anthony J. Guttmann and Iwan Jensen, Table of n, a(n) for n = 2..27
Anthony J. Guttmann and Iwan Jensen, Self-avoiding walks and polygons crossing a domain on the square and hexagonal lattices, arXiv:2208.06744 [math-ph], Aug 13 2022, Table D2 (with offset 1).
Anthony J. Guttmann and Iwan Jensen, The gerrymander sequence, or A348456, arXiv:2211.14482 [math.CO], 2022.
EXAMPLE
a(2) = 1;
+--*
| |
*--+
a(3) = 3;
+--*--* +--*--* +--*
| | | | | |
*--* * * * * *--*
| | | | | |
*--+ *--*--+ *--*--+
PROG
CROSSREFS
KEYWORD
nonn
AUTHOR
Seiichi Manyama, Mar 23 2020
EXTENSIONS
a(11) from Seiichi Manyama, Apr 07 2020
a(10) and a(12)-a(15) from Vaclav Kotesovec, Aug 16 2022 (computed by Anthony Guttmann)
STATUS
approved