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, 0, 0), (1, -1, 0), (1, -1, 1), (1, 1, -1), (1, 1, 0)}.
A149363
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, 0, 0), (1, -1, 0), (1, -1, 1), (1, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =44a(5) =160a(6) =635a(7) =2520a(8) =10374a(9) =43134a(10) =183372a(11) =785862a(12) =3413850a(13) =14943786a(14) =66054417a(15) =293780916a(16) =1315917746a(17) =5925586810a(18) =26832235430a(19) =122037157814a(20) =557522216602
External references
- oeis: A149363