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, 1), (-1, 1, 0), (0, 0, 1), (1, -1, 1), (1, 0, -1)}.
A148108
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, 1), (-1, 1, 0), (0, 0, 1), (1, -1, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =10a(5) =27a(6) =84a(7) =270a(8) =904a(9) =3149a(10) =11221a(11) =41052a(12) =153615a(13) =585423a(14) =2266898a(15) =8899882a(16) =35367261a(17) =142063183a(18) =576212939a(19) =2357624559a(20) =9722575246a(21) =40382761328a(22) =168823553558a(23) =709990487405
External references
- oeis: A148108