OFFSET
0,2
COMMENTS
For n > 0: a(n) = A219069(2*n-1,n).
LINKS
Reinhard Zumkeller, Table of n, a(n) for n = 0..10000
Index entries for linear recurrences with constant coefficients, signature (5,-10,10,-5,1).
FORMULA
G.f.: ( -1+2*x-128*x^2-286*x^3-91*x^4 ) / (x-1)^5 . - R. J. Mathar, Mar 31 2014
MATHEMATICA
Table[(21 n^4 - 36 n^3 + 25 n^2 - 8 n + 1), {n, 0, 40}] (* Vincenzo Librandi, Mar 21 2014 *)
LinearRecurrence[{5, -10, 10, -5, 1}, {1, 3, 133, 931, 3441}, 40] (* Harvey P. Dale, May 04 2016 *)
PROG
(Haskell)
a239426 n = (((21 * n - 36) * n + 25) * n - 8) * n + 1
(Magma) [21*n^4-36*n^3+25*n^2-8*n+1: n in [0..31]]; // Vincenzo Librandi, Mar 21 2014
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Reinhard Zumkeller, Mar 19 2014
STATUS
approved