OFFSET
1,8
LINKS
Andrew Howroyd, Table of n, a(n) for n = 1..200
Christopher R. H. Hanusa, T Zaslavsky, S Chaiken, A q-Queens Problem. IV. Queens, Bishops, Nightriders (and Rooks), arXiv preprint arXiv:1609.00853, a12016
Index entries for linear recurrences with constant coefficients, signature (17, -136, 680, -2380, 6188, -12376, 19448, -24310, 24310, -19448, 12376, -6188, 2380, -680, 136, -17, 1).
FORMULA
a(n) = 8!*binomial(n,8)^2.
G.f.: -40320*x^8*(x^8 +64*x^7 +784*x^6 +3136*x^5 +4900*x^4 +3136*x^3 +784*x^2 +64*x +1) / (x -1)^17. - Colin Barker, Jan 08 2013
PROG
(PARI) a(n) = 8!*binomial(n, 8)^2 \\ Andrew Howroyd, Feb 13 2018
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Thomas Zaslavsky, Jun 27 2010
STATUS
approved