-33840

Appears in sequences

• a(n) = Sum_{k=0..n} C(n,floor(k/2))*(-3)^(n-k).at n=9A127362
• Coefficients in the expansion of 1/([r] + [2r]x + [3r]x^2 + ...); [ ] = floor, r = 4/3.at n=31A279675