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, 0, 0), (0, -1, 1), (1, 1, -1), (1, 1, 1)}.
A149733
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, 0, 0), (0, -1, 1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =17a(4) =75a(5) =303a(6) =1337a(7) =5943a(8) =26723a(9) =122153a(10) =563311a(11) =2617471a(12) =12248479a(13) =57586121a(14) =272366507a(15) =1292397415a(16) =6155702591a(17) =29418323033a(18) =140956169741a(19) =677110012143
External references
- oeis: A149733