OFFSET
1,2
LINKS
G. C. Greubel, Table of n, a(n) for n = 1..445
FORMULA
(-23*n+116)*a(n) + (23*n^2-91*n-74)*a(n-1) + (-25*n^2+97*n-53)*a(n-2) + (n-2)*(2*n-21)*a(n-3) = 0. - R. J. Mathar, Sep 30 2013
E.g.f.: (4-3*x - (4-7*x+4*x^2-x^3)*exp(x))/(1-x). - G. C. Greubel, Aug 11 2019
MAPLE
seq(n! - (n-2)^2, n=1..25); # G. C. Greubel, Aug 11 2019
MATHEMATICA
Table[(m!-(m-2)^2 ), {m, 25}]
PROG
(PARI) vector(25, n, n! - (n-2)^2) \\ G. C. Greubel, Aug 11 2019
(Magma) [Factorial(n) - (n-2)^2: n in [1..25]]; // G. C. Greubel, Aug 11 2019
(Sage) [factorial(n) - (n-2)^2 for n in (1..25)] # G. C. Greubel, Aug 11 2019
(GAP) List([1..25], n-> Factorial(n) -(n-2)^2); # G. C. Greubel, Aug 11 2019
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Zerinvary Lajos, Mar 21 2007
STATUS
approved