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, 0, 1), (1, 0, -1), (1, 1, 1)}.
A150806
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, 0, 1), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =31a(4) =133a(5) =580a(6) =2610a(7) =11927a(8) =55280a(9) =258539a(10) =1219067a(11) =5781465a(12) =27560931a(13) =131931133a(14) =633782728a(15) =3053879066a(16) =14753631238a(17) =71438780218a(18) =346610422027
External references
- oeis: A150806