178031
domain: N
Appears in sequences
- Number of partitions of the set {1,2,...n} having no blocks that contain both odd and even entries.at n=13A124419
- Product of two successive Bell numbers.at n=6A124426
- Triangle, read by rows, where T(n,k) = A049020([n/2],k)*A049020([(n+1)/2],k).at n=49A124526
- Numbers of the form Bell(i)*Bell(j).at n=34A276281