25162747992domain: NAppears in sequencesNumber of nXnXn triangular 0..6 arrays with some element plus some adjacent element totalling 6+1 or 6-1 exactly once.at n=4A270604Number of 5X5X5 triangular 0..n arrays with some element plus some adjacent element totalling n+1 or n-1 exactly once.at n=5A270610