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, 0, -1), (1, 0, 1), (1, 1, 1)}.
A150946
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, 0, -1), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =35a(4) =151a(5) =669a(6) =3025a(7) =13784a(8) =63934a(9) =298236a(10) =1400365a(11) =6616111a(12) =31408939a(13) =149615411a(14) =715286089a(15) =3429871086a(16) =16486597064a(17) =79426519820a(18) =383442921843
External references
- oeis: A150946