571228600932domain: NAppears in sequencesNumber of nXnXn triangular 0..6 arrays with some element plus some adjacent element totalling 6+1, 6 or 6-1 exactly once.at n=5A270848Number of 6 X 6 X 6 triangular 0..n arrays with some element plus some adjacent element totalling n+1, n or n-1 exactly once.at n=5A270855