138256
domain: N
Appears in sequences
- a(1) = 3; for n>0, a(n+1) = a(n) + floor((a(n)-1)/2).at n=28A003312
- Number of conjugacy classes of primitive elements in GF(2^n) which have trace 0.at n=23A152049
- A(x) satisfies A005408(x) = A(x)/A(x^2), A005408 = odd numbers.at n=32A173283
- Coefficients in the expansion of 1/([r] + [2r]x + [3r]x^2 + ...); [ ] = floor, r = 4/3.at n=36A279675