A358698 Number of self-avoiding closed paths in the 7 X n grid graph which pass through all vertices on four (left, right, upper, lower) sides of the graph.

1, 21, 408, 6410, 113748, 2002405, 35669433, 633099244, 11240647480, 199480271184, 3540336868535, 62831861216325, 1115122033297714, 19790829247392636, 351241699540793996, 6233729269914805533, 110634310753645173365, 1963503651093439655818, 34847658208568166865562, 618465506517313482341986

Offset

2,2

Links

Seiichi Manyama, Table of n, a(n) for n = 2..50

Crossrefs

Row 7 of A333758.

Sequence in context: A240655 A014903 A219308 * A020534 A106656 A083043

Adjacent sequences: A358695 A358696 A358697 * A358699 A358700 A358701

Keyword

nonn

Author

Seiichi Manyama, Nov 27 2022

Status

approved