OFFSET
1,1
COMMENTS
Seems to be the fourth column of A316387.
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.: 140*x*(1 + 4*x + x^2) / (1 - x)^5.
a(n) = 35*n^4 + 70*n^3 + 35*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(140*x*(1 + 4*x + x^2) / (1 - x)^5 + O(x^40))
(PARI) a(n) = 35*n^4 + 70*n^3 + 35*n^2
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Colin Barker, Aug 13 2018
STATUS
approved