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, -1), (-1, -1, 1), (-1, 0, 0), (0, 1, -1), (1, 0, 1)}.
A148779
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, -1), (-1, -1, 1), (-1, 0, 0), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =23a(5) =81a(6) =264a(7) =916a(8) =3390a(9) =12224a(10) =46138a(11) =175706a(12) =669624a(13) =2618701a(14) =10257321a(15) =40497341a(16) =161706408a(17) =646521499a(18) =2607025411a(19) =10570576931a(20) =42983272026a(21) =175815936337a(22) =721178635794
External references
- oeis: A148779