13849920domain: NAppears in sequencesNumber of n-colorings of the vertices of the 6-dimensional cross polytope such that no two adjacent vertices have the same color.at n=9A342074Triangle read by rows: T(n, k) = [x^k] Sum_{j=0..n} FallingFactorial(n, j)*RisingFactorial(x, j).at n=42A391008