The number of partitions of the set {1,2,...,n} into subsets (blocks,cells) having a prime number of elements.

A190476

The number of partitions of the set {1,2,...,n} into subsets (blocks,cells) having a prime number of elements.

Terms

    a(0) =1a(1) =0a(2) =1a(3) =1a(4) =3a(5) =11a(6) =25a(7) =127a(8) =441a(9) =1954a(10) =10011a(11) =45266a(12) =264583a(13) =1445380a(14) =8585655a(15) =55660801a(16) =352151073a(17) =2482766225a(18) =17559191557a(19) =129772490863

External references