158819

Appears in sequences

• Numbers n such that 5*10^n + 6*R_n + 3 is prime, where R_n = 11...1 is the repunit (A002275) of length n.at n=29A103018
• Number of order-preserving or order-reversing full contraction mappings (of an n-chain) with exactly 1 fixed point.at n=14A221880
• Numbers n such that Sum_{q|n} 0.q is an integer where q ranges over the aliquot parts of n.at n=25A276699