35691domain: NAppears in sequencesNumber of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 1,6,4,6,0,0,1 for x=0,1,2,3,4,5,6.at n=6A197593Numbers n such that 2*n*3^n - 1 is prime.at n=22A271956