373275domain: NAppears in sequences"CFJ" (necklace, size, labeled) transform of 2,1,1,1...at n=11A032135A Galton triangle: T(n,k) = (2k-1)*(T(n-1,k) + T(n-1,k-1)): a type B analog of the ordered Bell numbers A019538.at n=25A186695