30020760domain: NAppears in sequencesa(n) = C(n+3,3) * C(n+5,5).at n=17A105946Numbers n such that 2n-1, 4n-1, 6n-1, 8n-1, 10n-1, 12n-1 and 14n-1 are primes.at n=9A124490Numbers n such that 2n-1, 4n-1, 6n-1, 8n-1, 10n-1, 12n-1, 14n-1 and 16n-1 are primes.at n=1A124491