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, 1), (-1, 1, 1), (0, 1, -1), (1, -1, 0), (1, 0, 0)}.
A148875
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, 1), (-1, 1, 1), (0, 1, -1), (1, -1, 0), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =29a(5) =104a(6) =405a(7) =1634a(8) =6788a(9) =28922a(10) =125559a(11) =554058a(12) =2474920a(13) =11188064a(14) =51025586a(15) =234609810a(16) =1086430868a(17) =5061096381a(18) =23702973326a(19) =111544459533a(20) =527097647852
External references
- oeis: A148875