21535

Appears in sequences

• Total number of smallest parts in all partitions of n that do not contain 1 as a part.at n=40A195820
• Products p*q*r of three distinct primes such that (p*q) mod r, (p*r) mod q and (q*r) mod p are all prime.at n=23A338704
• Lesser of 2 successive sphenic numbers (k, k+4) sandwiching 3 consecutive nonsquarefree numbers.at n=29A363830