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), (0, 1, 1), (1, -1, 0)}.
A148796
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), (0, 1, 1), (1, -1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =25a(5) =83a(6) =291a(7) =1011a(8) =3708a(9) =13893a(10) =52796a(11) =201675a(12) =786971a(13) =3101031a(14) =12312796a(15) =49207116a(16) =198635240a(17) =806439581a(18) =3290613339a(19) =13498671882a(20) =55687738095a(21) =230635399029a(22) =958715226219
External references
- oeis: A148796