A329514 Expansion of g.f.: (2*x^5-3*x^4+x^3-2*x^2-1)*(1+x)^2/(x-1).
1, 3, 6, 9, 12, 15, 14, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12
Offset: 0
Links
- Index entries for linear recurrences with constant coefficients, signature (1).
Crossrefs
Row 3 of array in A329512.
Formula
a(n) = 12 for n >= 7.
E.g.f.: 12*exp(x) - 11 - 9*x - x^2*(1080 + 180*x - 9*x^3 - x^4)/360. - Stefano Spezia, Oct 08 2022