Irregular triangle read by rows: T(n,k) is the number of sets of lists with distinct block sizes (as in A088311(n)) and containing exactly k lists.

A351884

Irregular triangle read by rows: T(n,k) is the number of sets of lists with distinct block sizes (as in A088311(n)) and containing exactly k lists.

Terms

    a(0) =1a(1) =0a(2) =1a(3) =0a(4) =2a(5) =0a(6) =6a(7) =6a(8) =0a(9) =24a(10) =24a(11) =0a(12) =120a(13) =240a(14) =0a(15) =720a(16) =1440a(17) =720a(18) =0a(19) =5040a(20) =15120a(21) =5040a(22) =0a(23) =40320a(24) =120960a(25) =80640a(26) =0a(27) =362880a(28) =1451520a(29) =1088640

External references