32937

Appears in sequences

• Triangle read by rows: number of commutative monoids of order n with k idempotents.at n=39A058142
• a(n) = Sum_{i+j+k=n, i,j,k >= 1} tau(i)*tau(j)*tau(k), where tau() = A000005().at n=42A191829
• Numbers k such that (14*10^k - 221)/9 is prime.at n=22A282383
• Distance from 10^n to the next prime triplet.at n=25A357052
• a(n) = Sum_{p|n, p prime} p^sopf(n/p).at n=51A369912