167397

Appears in sequences

• Number of idempotents of rank 1 in partition monoid P_n.at n=5A256033
• Triangle read by rows: number of idempotent basis elements of rank k in partition monoid P_n.at n=22A256042
• Expansion of Product_{k>=1} 1 / (1 - 4^(k-1)*x^k).at n=9A338673