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, 1, -1), (0, 1, 1), (1, 0, 0)}.
A150208
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, 1, -1), (0, 1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =21a(4) =81a(5) =316a(6) =1290a(7) =5364a(8) =22671a(9) =97134a(10) =421395a(11) =1842859a(12) =8120955a(13) =36030211a(14) =160720110a(15) =720399057a(16) =3243337538a(17) =14657442438a(18) =66462177523a(19) =302297076810
External references
- oeis: A150208