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, 1), (-1, 0, 1), (1, 1, -1), (1, 1, 0)}.
A149161
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, 1), (-1, 0, 1), (1, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =9a(4) =40a(5) =114a(6) =528a(7) =1703a(8) =8060a(9) =28046a(10) =134504a(11) =492714a(12) =2383928a(13) =9063508a(14) =44127320a(15) =172559091a(16) =844018252a(17) =3374183038a(18) =16561875136a(19) =67397982670a(20) =331727733384
External references
- oeis: A149161