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, 1, 0), (1, 0, -1), (1, 1, -1), (1, 1, 1)}.
A149679
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, 1, 0), (1, 0, -1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =17a(4) =67a(5) =247a(6) =1099a(7) =4455a(8) =19545a(9) =81193a(10) =367927a(11) =1586737a(12) =7157861a(13) =31187449a(14) =142977035a(15) =635088717a(16) =2905801469a(17) =12983274605a(18) =59979785943a(19) =271113149209
External references
- oeis: A149679