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), (-1, 1, -1), (1, -1, 0), (1, 0, 1)}.
A148218
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), (-1, 1, -1), (1, -1, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =13a(5) =31a(6) =94a(7) =268a(8) =906a(9) =2645a(10) =9319a(11) =28964a(12) =104652a(13) =334941a(14) =1249903a(15) =4101216a(16) =15514955a(17) =52110795a(18) =199934175a(19) =683264305a(20) =2650004523a(21) =9184094586a(22) =35965634307a(23) =126280106377a(24) =498198750670
External references
- oeis: A148218