Number A(n,k) of set partitions of [k*n] such that within each block the numbers of elements from all residue classes modulo k are equal for k>0, A(n,0)=1; square array A(n,k), n>=0, k>=0, read by antidiagonals.
A275043
Number A(n,k) of set partitions of [k*n] such that within each block the numbers of elements from all residue classes modulo k are equal for k>0, A(n,0)=1; square array A(n,k), n>=0, k>=0, read by antidiagonals.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =2a(9) =1a(10) =1a(11) =1a(12) =3a(13) =5a(14) =1a(15) =1a(16) =1a(17) =5a(18) =16a(19) =15a(20) =1a(21) =1a(22) =1a(23) =9a(24) =64a(25) =131a(26) =52a(27) =1a(28) =1a(29) =1
External references
- oeis: A275043