954437167domain: NAppears in sequencesa(n) = (1/9)(2^(n+3)-(-1)^n(3n-1)).at n=30A103196Expansion of (1-2x^2)/((1-2x)(1+x)^2).at n=32A113954a(n) is the smallest number whose greedy representation as a sum of terms of A126684 uses n terms.at n=15A302757