OFFSET
1,1
COMMENTS
Seems to be the negative of the second column of A316349.
LINKS
Colin Barker, Table of n, a(n) for n = 1..1000
Index entries for linear recurrences with constant coefficients, signature (5,-10,10,-5,1).
FORMULA
G.f.: 60*x*(1 + 4*x + x^2) / (1 - x)^5.
a(n) = 60 * A000537(n).
a(n) = 15*n^4 + 30*n^3 + 15*n^2.
a(n) = 5*a(n-1) - 10*a(n-2) + 10*a(n-3) - 5*a(n-4) + a(n-5) for n>5.
PROG
(PARI) Vec(60*x*(1 + 4*x + x^2) / (1 - x)^5 + O(x^40))
(PARI) a(n) = 15*n^4 + 30*n^3 + 15*n^2
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Colin Barker, Aug 12 2018
STATUS
approved