50861domain: NAppears in sequencesIndices of primes at which the prime race 4k-1 vs. 4k+1 is tied.at n=40A038691Numbers whose base-15 representation has exactly 5 runs.at n=10A043672Composite and every divisor (except 1) contains the digit 8.at n=8A062678Numbers k such that (5*10^k - 107)/3 is prime.at n=22A281641