50194domain: NAppears in sequencesNumbers n such that 3*10^n-7 is prime.at n=19A102964Number of (n+1)X(n+1) -10..10 symmetric matrices with every 2X2 subblock having sum zero and two or three distinct values.at n=7A211816a(n) = (n-1)! + 1 mod n^3.at n=38A301317