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, 0, 0), (0, 1, 1), (1, -1, 0), (1, -1, 1), (1, 1, -1)}.
A149492
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, 0, 0), (0, 1, 1), (1, -1, 0), (1, -1, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =14a(4) =59a(5) =243a(6) =1065a(7) =4708a(8) =21395a(9) =98025a(10) =454964a(11) =2126156a(12) =10012574a(13) =47398340a(14) =225511507a(15) =1077175891a(16) =5163669175a(17) =24827400812a(18) =119693621775a(19) =578392088330
External references
- oeis: A149492