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, 0), (-1, 1, 0), (0, 0, 1), (1, 0, -1), (1, 1, 0)}.
A150404
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, 0), (-1, 1, 0), (0, 0, 1), (1, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =24a(4) =93a(5) =370a(6) =1532a(7) =6489a(8) =28073a(9) =123084a(10) =547636a(11) =2456285a(12) =11132291a(13) =50748503a(14) =233047306a(15) =1075234895a(16) =4987712376a(17) =23224769741a(18) =108598776603a(19) =509369414469
External references
- oeis: A150404