87333

Appears in sequences

• G.f.: exp( Sum_{n>=1} sigma(n*2^(n-1))*x^n/n ).at n=12A176361
• Number of pairs (lambda,mu) of partitions lambda of n and mu of ceiling(n/2) with mu <= lambda (by diagram containment).at n=25A303852
• Number of pairs (lambda,mu) of partitions lambda of 2n+1 and mu of n+1 with mu <= lambda (by diagram containment).at n=12A303863