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, 1), (0, 1, 0), (1, -1, 1), (1, 1, -1)}.
A148437
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, 1), (0, 1, 0), (1, -1, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =19a(5) =67a(6) =288a(7) =1151a(8) =5166a(9) =21993a(10) =101298a(11) =448645a(12) =2103115a(13) =9563057a(14) =45376178a(15) =210129929a(16) =1005672823a(17) =4718671583a(18) =22726455310a(19) =107680660715a(20) =521111158087
External references
- oeis: A148437