A195658 -id:A195658 - cp's OEIS frontend

A195653 Number of ways to place 9n nonattacking kings on an 18 X 2n cylindrical chessboard.

5120, 21508, 109796, 626780, 3877300, 25603228, 178909300, 1314748124, 10105541204, 80812754568, 668845118276, 5700499630916, 49800720887968, 444140848321356, 4029482453905756, 37080781799409148, 345278411878468044, 3246772078088155432, 30781946900321278256

Offset: 1

Vaclav Kotesovec, Sep 22 2011

nonn

This cylinder is horizontal: a chessboard where it is supposed that rows 1 and 2n are in contact (number of columns = 18, number of rows = 2n).

Alex V. Breger, Table of n, a(n) for n = 1..1000
Artem M. Karavaev, Zealint blog (in Russian)
V. Kotesovec, Non-attacking chess pieces
Vaclav Kotesovec, Generating function
Index entries for linear recurrences with constant coefficients, order 400.

Cf. A137432, A195648, A195658.

Recurrence order is 400.

A195648 Number of ways to place 9n nonattacking kings on a 18 x 2n chessboard.

Original entry on oeis.org

5120, 1501674, 144605184, 7683664202, 282359109140, 8080813574550, 193194265398240, 4035559337688370, 75925129079783308, 1314578079936797520, 21279238303065874504, 325878859655043000344, 4765036384361599508980, 67005992305769489072298, 911373843678367079288192

Offset: 1

Vaclav Kotesovec, Sep 22 2011

nonn

Alex V. Breger, Table of n, a(n) for n = 1..1000
Vaclav Kotesovec, Non-attacking chess pieces
Vaclav Kotesovec, Generating function
Index entries for linear recurrences with constant coefficients, order 548.

Column k=9 of A350819.

Cf. A174558, A018807, A195653, A195658.

Recurrence order is 548.

cp's OEIS Frontend

A195653 Number of ways to place 9n nonattacking kings on an 18 X 2n cylindrical chessboard.

Views

Author

Keywords

Comments

Links

Crossrefs

Formula