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, 1), (1, 0, -1), (1, 0, 1)}.
A150638
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, 1), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =27a(4) =116a(5) =497a(6) =2232a(7) =10122a(8) =46820a(9) =217378a(10) =1022711a(11) =4830705a(12) =22970740a(13) =109584144a(14) =525462784a(15) =2525499776a(16) =12177778554a(17) =58848262607a(18) =285083921385
External references
- oeis: A150638