45512

Appears in sequences

• Triangle A(n,m) of numbers of n-element ordered T_0-antichains on an unlabeled m-set or numbers of T_1-hypergraphs on n labeled nodes with m (not necessarily empty) distinct hyperedges (m=0,1,...,2^n).at n=42A059048
• Expansion of (1/3) * (c(q)^2 / c(q^2)) / (b(q)^2 / b(q^2)) in powers of q where b(), c() are cubic AGM theta functions.at n=9A128639
• Expansion of phi(-q^9) / phi(-q) in powers of q where phi() is a Ramanujan theta function.at n=27A128770