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), (0, 1, -1), (1, 0, -1), (1, 1, 0), (1, 1, 1)}.
A150834
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), (0, 1, -1), (1, 0, -1), (1, 1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =32a(4) =136a(5) =598a(6) =2690a(7) =12346a(8) =57208a(9) =267850a(10) =1263588a(11) =5994932a(12) =28592366a(13) =136903040a(14) =657880056a(15) =3170624544a(16) =15320492804a(17) =74194979122a(18) =360020846672
External references
- oeis: A150834