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, 0, 1), (0, 1, -1), (0, 1, 1), (1, 0, 0)}.
A150196
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, 0, 1), (0, 1, -1), (0, 1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =21a(4) =79a(5) =307a(6) =1251a(7) =5157a(8) =21770a(9) =93084a(10) =402471a(11) =1757704a(12) =7735990a(13) =34272982a(14) =152769404a(15) =684287508a(16) =3078918306a(17) =13908382920a(18) =63045086927a(19) =286686826482
External references
- oeis: A150196