OFFSET
0,3
COMMENTS
Wazir is a leaper [0,1].
LINKS
Vaclav Kotesovec, Table of n, a(n) for n = 0..21 (terms a(11)-a(18) computed by Peter Tittmann)
V. Kotesovec, Non-attacking chess pieces, 6ed, 2013, p. 382.
Peter Tittmann, Polynomials of nxn Grid Graphs [broken link]
FORMULA
Asymptotics (Vaclav Kotesovec, Nov 29 2011): a(n) ~ n^(2n)/n!*exp(-5/2).
CROSSREFS
KEYWORD
nonn,nice,hard
AUTHOR
Vaclav Kotesovec, Dec 02 2011
EXTENSIONS
a(19)-a(20) from Vaclav Kotesovec, Aug 30 2016
a(0)=1 prepended by Alois P. Heinz, Apr 16 2024
STATUS
approved