OFFSET
0,2
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..10000
Olivier Rozier, Ramanujan's tau function
Index entries for linear recurrences with constant coefficients, signature (7,-21,35,-35,21,-7,1).
FORMULA
From Colin Barker, Dec 26 2017: (Start)
G.f.: (1 + 665*x + 29044*x^2 + 137524*x^3 + 135139*x^4 + 29243*x^5 + 1024*x^6) / (1 - x)^7.
a(n) = 7*a(n-1) - 21*a(n-2) + 35*a(n-3) - 35*a(n-4) + 21*a(n-5) - 7*a(n-6) + a(n-7) for n>6.
(End)
PROG
(PARI) {a(n) = 462*n^6+330*n^4-165*n^3+55*n^2-11*n+1}
(PARI) Vec((1 + 665*x + 29044*x^2 + 137524*x^3 + 135139*x^4 + 29243*x^5 + 1024*x^6) / (1 - x)^7 + O(x^40)) \\ Colin Barker, Dec 26 2017
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Seiichi Manyama, Dec 26 2017
STATUS
approved