OFFSET
1,2
COMMENTS
Wazir is a (fairy chess) leaper [0,1].
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
Eric Weisstein's World of Mathematics, Grid Graph
Wikipedia, Wazir (chess)
FORMULA
a(n) = (64*n^4 - 432*n^3 + 1235*n^2 - 1797*n + 1122)/6, n>=3.
G.f.: -x^2*(4*x^5+12*x^4+67*x^3+120*x^2+51*x+2)/(x-1)^5. - Vaclav Kotesovec, Mar 25 2010
MATHEMATICA
CoefficientList[Series[- x (4 x^5 + 12 x^4 + 67 x^3 + 120 x^2 + 51 x + 2) / (x - 1)^5, {x, 0, 50}], x] (* Vincenzo Librandi, May 28 2013 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Vaclav Kotesovec, Jan 29 2010
EXTENSIONS
More terms from Vincenzo Librandi, May 28 2013
STATUS
approved