Refines A075197(n): number of partitions of n balls of n colors. The refinement has shape A000041(n).

A130273

Refines A075197(n): number of partitions of n balls of n colors. The refinement has shape A000041(n).

Terms

    a(0) =1a(1) =4a(2) =2a(3) =9a(4) =24a(5) =5a(6) =20a(7) =84a(8) =54a(9) =132a(10) =15a(11) =35a(12) =240a(13) =320a(14) =630a(15) =780a(16) =720a(17) =52a(18) =66a(19) =570a(20) =870a(21) =2280a(22) =465a(23) =6240a(24) =4440a(25) =1320a(26) =8280a(27) =4050a(28) =203a(29) =105

External references