97064domain: NAppears in sequencesNumbers n such that 3*2^(n-1) - 1 is prime.at n=43A091997Number of (w,x,y,z) with all terms in {1,...,n} and w >= |x-y| + |y-z|.at n=22A212675Column 3 of array in A226513.at n=43A226514