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), (0, 0, 1), (0, 1, -1), (0, 1, 1), (1, 0, -1)}.
A150673
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), (0, 0, 1), (0, 1, -1), (0, 1, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =25a(4) =106a(5) =399a(6) =1777a(7) =7262a(8) =33233a(9) =142659a(10) =664407a(11) =2943137a(12) =13873625a(13) =62821925a(14) =298736121a(15) =1374516417a(16) =6579644721a(17) =30642584393a(18) =147440960403a(19) =693166827934
External references
- oeis: A150673