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), (-1, 1, -1), (0, 1, 1), (1, -1, 0)}.
A148346
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), (-1, 1, -1), (0, 1, 1), (1, -1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =15a(5) =39a(6) =127a(7) =405a(8) =1330a(9) =4478a(10) =15616a(11) =54421a(12) =194793a(13) =701786a(14) =2564926a(15) =9449251a(16) =35159072a(17) =131736416a(18) =497409539a(19) =1889423167a(20) =7221080327a(21) =27736071934a(22) =107096007187a(23) =415304492985
External references
- oeis: A148346