A339120 Number of cycles in the grid graph P_8 X P_n.

28, 1664, 114069, 5948291, 279285399, 12947640143, 603841648931, 28251882697663, 1322310119854705, 61875355046353061, 2895006802805407868, 135448608195945754204, 6337277838067727854392, 296505504331623399871908, 13872765058478362509835979, 649072483984291902586660423

Offset

2,1

Links

Andrew Howroyd, Table of n, a(n) for n = 2..200

Eric Weisstein's World of Mathematics, Graph Cycle

Eric Weisstein's World of Mathematics, Grid Graph

Crossrefs

Cf. A140517, A145418, A231829.

Sequence in context: A335371 A335370 A335368 * A194190 A190397 A004705

Adjacent sequences: A339117 A339118 A339119 * A339121 A339122 A339123

Keyword

nonn

Author

Seiichi Manyama, Nov 24 2020

Extensions

Terms a(10) and beyond from Andrew Howroyd, Dec 08 2020

Status

approved