190935

Appears in sequences

• Numbers n such that 6*10^n + 3*R_n + 4 is prime, where R_n = 11...1 is the repunit (A002275) of length n.at n=23A103033
• Number of subsets (up to cyclic shifts) of the n-th roots of 1 with zero sum.at n=43A164896
• Numbers n such that n+2, n+4, n+6, n+8, n+10, n+12 and n+14 are all semiprimes.at n=13A268578