1699300

Appears in sequences

• Number of set partitions of [9*n] such that within each block the numbers of elements from all residue classes modulo 9 are equal.at n=3A275098
• Number of set partitions of [3*n] such that within each block the numbers of elements from all residue classes modulo n are equal for n>0, a(0)=1.at n=9A275100