A362509 Number of vertex cuts in the n X n black bishop graph.

0, 0, 9, 87, 2940, 67392, 6075837, 442152975, 133476737988

Offset

1,3

Links

Table of n, a(n) for n=1..9.

Eric Weisstein's World of Mathematics, Black Bishop Graph

Eric Weisstein's World of Mathematics, Vertex Cut

Formula

a(n) = 2^ceiling(n^2/2) - 1 - A290719(n). - Pontus von Brömssen, Apr 23 2023

Crossrefs

Cf. A290719.

Sequence in context: A351525 A245491 A160466 * A015583 A152266 A260041

Adjacent sequences: A362506 A362507 A362508 * A362510 A362511 A362512

Keyword

nonn,more

Author

Eric W. Weisstein, Apr 23 2023

Extensions

a(8)-a(9) (based on data in A290719) from Pontus von Brömssen, Apr 23 2023

Status

approved