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), (0, -1, 1), (0, 0, 1), (1, -1, 1), (1, 1, -1)}.
A148487
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), (0, -1, 1), (0, 0, 1), (1, -1, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =21a(5) =73a(6) =267a(7) =1022a(8) =4041a(9) =16303a(10) =66951a(11) =279275a(12) =1180486a(13) =5043381a(14) =21742492a(15) =94484328a(16) =413498117a(17) =1820760068a(18) =8060811170a(19) =35859891401a(20) =160225912174a(21) =718718698186
External references
- oeis: A148487