OFFSET
0,5
COMMENTS
A possible formula for, or lower bound on, or at least a benchmark for, A250000.
LINKS
Colin Barker, Table of n, a(n) for n = 0..1000
Index entries for linear recurrences with constant coefficients, signature (2, -2, 2, -1, 0, 1, -2, 2, -2, 1, 0, -1, 2, -2, 2, -1, 0, 1, -2, 2, -2, 1).
FORMULA
G.f.: x^3*(1 + x^2 + x^3 + x^5 - x^6 + x^7 - x^8 + x^9 - x^10 + x^11 + x^13 + x^14 + x^16) / ((1 - x)^3*(1 + x)*(1 - x + x^2)*(1 + x^2)*(1 + x + x^2)*(1 + x^4)*(1 - x^4 + x^8)). - Colin Barker, May 22 2017
MATHEMATICA
Table[Floor[7 n^2/48], {n, 0, 64}] (* Michael De Vlieger, May 22 2017 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, May 12 2017
STATUS
approved