OFFSET
1,9
COMMENTS
See Theorem 5 of Liedahl. - Eric M. Schmidt, Jan 09 2015
LINKS
Colin Barker, Table of n, a(n) for n = 1..1000
Steven Liedahl, Enumeration of metacyclic p-groups, J. Algebra 186 (1996), no. 2, 436-446.
Index entries for linear recurrences with constant coefficients, signature (1,2,-1,-2,-1,2,1,-1).
FORMULA
G.f.: -x^8*(x^3-x-1) / ((x-1)^4*(x+1)^2*(x^2+x+1)). - Colin Barker, Jan 12 2015
PROG
(PARI) concat([0, 0, 0, 0, 0, 0, 0], Vec(-x^8*(x^3-x-1)/((x-1)^4*(x+1)^2*(x^2+x+1)) + O(x^100))) \\ Colin Barker, Jan 12 2015
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
S. Liedahl
EXTENSIONS
More terms and initial zeros from Eric M. Schmidt, Jan 11 2015
STATUS
approved