397066domain: NAppears in sequencesNumbers n such that 10000000n+1, 10000000n+3, 10000000n+7, 10000000n+9 are all primes.at n=22A064966Triangle read by rows: T(n, k) = (n-k)^n - n*k*(n-k) + k^n, with T(0, 0) = 1.at n=39A129821Triangle read by rows: T(n, k) = (n-k)^n - n*k*(n-k) + k^n, with T(0, 0) = 1.at n=41A129821