121101

Appears in sequences

• Twin prime products minus 2.at n=20A124659
• Positive integers m such that none of the four consecutive numbers m, m+1, m+2, m+3 can be written as p^2 + q with p and q both prime.at n=27A258661
• Pseudoprimes to base 6, written in base 6.at n=28A262103
• Number of integer partitions of n that are empty, have smallest part not dividing all the others, or greatest part not divisible by all the others.at n=47A343346