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, 0, 0), (-1, 0, 1), (0, -1, 1), (1, 1, 0)}.
A149245
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, 0, 0), (-1, 0, 1), (0, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =11a(4) =36a(5) =138a(6) =470a(7) =1811a(8) =6957a(9) =26509a(10) =106308a(11) =418838a(12) =1680174a(13) =6831180a(14) =27657994a(15) =113594502a(16) =467388473a(17) =1929858509a(18) =8021111685a(19) =33391836563a(20) =139565619390a(21) =585228693864
External references
- oeis: A149245