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, 0, 1), (-1, 1, 1), (0, -1, 1), (1, 1, 0)}.
A149268
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, 0, 1), (-1, 1, 1), (0, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =11a(4) =40a(5) =147a(6) =537a(7) =2067a(8) =8090a(9) =31759a(10) =127226a(11) =512728a(12) =2085944a(13) =8530109a(14) =35108141a(15) =145290427a(16) =603473533a(17) =2516899058a(18) =10535376447a(19) =44235546052a(20) =186238821286a(21) =786137476704
External references
- oeis: A149268