131403domain: NAppears in sequencesa(n) = 16*n^4 + 32*n^3 + 36*n^2 + 20*n + 3.at n=9A094200a(n) = floor(1/{(10+n^4)^(1/4)}), where {}=fractional part.at n=68A184634Number of unlabeled balanced rooted semi-identity trees with 2n-1 nodes and depth n.at n=26A306274