21590

Appears in sequences

• Matrix inverse of triangle A022166.at n=42A135950
• Eigentriangle of triangle A022166: T(n,k) = A022166(n,k) * A125812(k).at n=38A143774
• Triangle read by rows generated from (x-1)*(x-2)*(x-4)*...at n=38A158474
• Second elementary symmetric function of the first n terms of (1,2,4,8,...).at n=6A203241
• Number of partitions of 8^n into parts that are at most n with at least one part of each size.at n=3A239167
• Number of partitions of n, where the difference between the number of odd parts and the number of even parts is 5.at n=49A240014
• The growth series for the affine Weyl group F_4.at n=35A266784
• Number of set partitions of [n] into exactly four blocks such that all odd elements are in blocks with an odd index and all even elements are in blocks with an even index.at n=13A274868
• G.f. A(x) satisfies A(x) = sqrt( (1 + 2*x) * (1 + 2*x*A(x)) ).at n=23A379326