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), (-1, 1, 0), (0, 1, 0), (1, -1, 0)}.
A148175
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), (-1, 1, 0), (0, 1, 0), (1, -1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =12a(5) =28a(6) =86a(7) =228a(8) =764a(9) =2154a(10) =7536a(11) =22483a(12) =81267a(13) =252254a(14) =932906a(15) =2985042a(16) =11232797a(17) =36792087a(18) =140518797a(19) =469089364a(20) =1814209956a(21) =6155398969a(22) =24055291339a(23) =82766261243a(24) =326229083082
External references
- oeis: A148175