393179domain: NAppears in sequencesa(n) = 3*(2^n-1) - 2*n.at n=17A050488Expansion of (1-x)^(-1)/(1 - x - 2*x^2 + 2*x^3).at n=32A077866a(n) = 6*2^n - 2*n - 5.at n=16A142964Number of additive cyclic codes over GF(4) of length n.at n=15A143695Number of enriched p-trees of weight n with distinct leaves.at n=32A300354