72119domain: NAppears in sequencesa(1) = 1, then the smallest number such that there are a(n) composite numbers between a(n) and a(n+1) both excluded.at n=13A082280Duplicate of A082280.at n=13A097969Indices of primes in sequence defined by A(0) = 73, A(n) = 10*A(n-1) + 23 for n > 0.at n=11A101144