A370210 Number of chordless cycles in the n X n black bishop graph.

0, 0, 0, 3, 15, 97, 597, 5098, 47746, 582342, 7691278, 125339157, 2195109753, 45664819407, 1013323126923, 26022340062564, 709267685968788, 21939269071805596, 717007984481424300, 26196923530426606903

Offset

1,4

Links

Table of n, a(n) for n=1..20.

Eric Weisstein's World of Mathematics, Black Bishop Graph

Eric Weisstein's World of Mathematics, Chordless Cycle

Formula

For n > 1, a(n) = A370224(n) - A303542(n).

Crossrefs

Cf. A303542 (white bishop graph), A370224 (bishop graph).

Sequence in context: A076301 A112913 A109283 * A079689 A262751 A231445

Adjacent sequences: A370207 A370208 A370209 * A370211 A370212 A370213

Keyword

nonn,more

Author

Eric W. Weisstein, Feb 12 2024

Status

approved