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, -1), (0, 0, 1), (0, 1, -1), (1, -1, -1)}.
A148011
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, -1), (0, 0, 1), (0, 1, -1), (1, -1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =8a(5) =15a(6) =44a(7) =101a(8) =338a(9) =849a(10) =2736a(11) =7555a(12) =25254a(13) =73321a(14) =243290a(15) =762927a(16) =2557674a(17) =8162769a(18) =27492592a(19) =92263125a(20) =312597658a(21) =1055555063a(22) =3634419897a(23) =12618793174a(24) =43555825107a(25) =151808509939a(26) =534943761678
External references
- oeis: A148011