75771

Appears in sequences

• Triangle read by rows: T(n,k) is the number of partitions of the set {1,2,...,n}, having exactly k blocks consisting only odd entries (0<=k<=ceiling(n/2)).at n=41A124420
• Number of partitions of the set {1,2,...,n} having no blocks that contain only odd entries.at n=11A124421
• Numbers k such that k and k^2 use only the digits 1, 2, 4, 5 and 7.at n=18A136989