20736000

Appears in sequences

• Let k(n) = mod(3,n)-1. Then a(n) = 4*a(n-1) if n is odd, otherwise ((5+k(n))/4)*a(n-1), with a(0) = 1, a(1) = 2.at n=21A123761
• Denominators of Blandin-Diaz compositional Bernoulli numbers (B^Z)_1,n.at n=9A132097
• Partial products of PartitionsQ numbers (A000009).at n=12A152827
• Number of paths through the subset array of {1,2,...,n} that have range a subset of {1,2}; see Comments at A208650.at n=6A208661