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, 0, -1), (0, 0, 1), (1, 0, 1)}.
A150339
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, 0, -1), (0, 0, 1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =23a(4) =86a(5) =324a(6) =1299a(7) =5248a(8) =21803a(9) =91109a(10) =386870a(11) =1652908a(12) =7140192a(13) =31015614a(14) =135755899a(15) =596894225a(16) =2639027048a(17) =11712554874a(18) =52208189271a(19) =233481867841
External references
- oeis: A150339