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, 1, -1), (0, 1, 0), (1, -1, 1)}.
A148401
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, 1, -1), (0, 1, 0), (1, -1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =17a(5) =49a(6) =175a(7) =574a(8) =2215a(9) =7794a(10) =31002a(11) =114827a(12) =469571a(13) =1802223a(14) =7507304a(15) =29616634a(16) =125224110a(17) =504660980a(18) =2158999665a(19) =8852141829a(20) =38237746911a(21) =159011512866a(22) =692421182858
External references
- oeis: A148401