Number of set partitions of [4*n] such that within each block the numbers of elements from all residue classes modulo n are equal for n>0, a(0)=1.

A275101

Number of set partitions of [4*n] such that within each block the numbers of elements from all residue classes modulo n are equal for n>0, a(0)=1.

Terms

    a(0) =1a(1) =15a(2) =131a(3) =1613a(4) =25097a(5) =461105a(6) =9483041a(7) =209175233a(8) =4802367617a(9) =112660505345

External references