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A358713
Number of self-avoiding closed paths on an n X 7 grid which pass through four corners ((0,0), (0,6), (n-1,6), (n-1,0)).
2
1, 41, 1081, 26515, 674292, 17720400, 471468756, 12570253556, 335101401877, 8932110760401, 238088717357193, 6346541968642151, 169176879483125528, 4509681115981777876, 120212775466066851264, 3204464007623702644476, 85420126381414152110475, 2277010595175522782497635
OFFSET
2,2
COMMENTS
Also number of self-avoiding closed paths on a 7 X n grid which pass through four corners ((0,0), (0,6), (n-1,6), (n-1,0)).
LINKS
CROSSREFS
Column k=7 of A333513.
Cf. A358698.
Sequence in context: A368809 A069362 A016093 * A130639 A196744 A196902
KEYWORD
nonn
AUTHOR
Seiichi Manyama, Nov 28 2022
STATUS
approved