Number 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, 1, 0), (1, -1, 1)}.
A148422
Number 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, 1, 0), (1, -1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =18a(5) =58a(6) =202a(7) =736a(8) =2842a(9) =10959a(10) =43399a(11) =175792a(12) =720009a(13) =2977404a(14) =12486416a(15) =52878780a(16) =225071867a(17) =965947847a(18) =4178003062a(19) =18156229431a(20) =79240920764a(21) =347851189938
External references
- oeis: A148422