A174154 Number of ways to place 6n nonattacking kings on a 12 x 2n chessboard.

1, 448, 30319, 976640, 21137959, 357365350, 5109144543, 64737165162, 749160010737, 8080813574550, 82425144219429, 803491953235264, 7545414941610145, 68680800264413920, 608889093898882615, 5278006575696293456, 44873569636443901967, 375159494582050088590, 3090799708762482416287

Offset

0,2

Links

Table of n, a(n) for n=0..18.

Vaclav Kotesovec, Number of ways of placing non-attacking queens and kings on boards of various sizes

Vaclav Kotesovec, G.f.

Crossrefs

Column k=6 of A350819.

Cf. A061594, A061593, A018807, A173782, A173783.

Sequence in context: A120104 A229378 A229370 * A071104 A087700 A344827

Adjacent sequences: A174151 A174152 A174153 * A174155 A174156 A174157

Keyword

nonn

Author

Vaclav Kotesovec, Mar 10 2010

Extensions

More terms from Jinyuan Wang, Feb 26 2020

a(0)=1 prepended by Andrew Howroyd, Mar 26 2023

Status

approved