803053domain: NPropertiesPrimalityPrimeyesAppears in sequencesDerived from secondary diagonal of table A124550; a(n) = A124550(n+1,n)/(n+1).at n=6A124559Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, 1), (0, -1, 1), (0, 0, 1), (1, 1, -1)}.at n=12A148466Prime numbersat n=64175