247809domain: NAppears in sequencesTriangle read by rows: T(n, k) = 2^n*(q^k - 1)*(q^(n - k) - 1) + 1, where q = 3.at n=30A176794Triangle read by rows: T(n, k) = 2^n*(q^k - 1)*(q^(n - k) - 1) + 1, where q = 3.at n=33A176794a(n) = 2^n * n^2 + 1.at n=11A248917Expansion of Sum_{k>0} (x / (1 - (2 * x)^k))^k.at n=15A360802