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, 1), (-1, 0, 0), (0, 1, 0), (1, 0, -1), (1, 1, 0)}.
A150089
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, 1), (-1, 0, 0), (0, 1, 0), (1, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =19a(4) =66a(5) =243a(6) =930a(7) =3677a(8) =14893a(9) =61580a(10) =258798a(11) =1103083a(12) =4757383a(13) =20729422a(14) =91130929a(15) =403776628a(16) =1801448724a(17) =8086934285a(18) =36504894978a(19) =165610128497a(20) =754727631760
External references
- oeis: A150089