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), (0, 0, 1), (0, 1, 0), (1, -1, 0)}.
A149866
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), (0, 0, 1), (0, 1, 0), (1, -1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =13a(4) =40a(5) =134a(6) =467a(7) =1671a(8) =6172a(9) =23436a(10) =90370a(11) =354271a(12) =1410448a(13) =5681881a(14) =23111260a(15) =94915721a(16) =393246863a(17) =1640456796a(18) =6888518741a(19) =29110220069a(20) =123682094892a(21) =528032933464
External references
- oeis: A149866