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, 1), (-1, 1, 0), (1, -1, -1), (1, 0, 0)}.
A148518
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, 1), (-1, 1, 0), (1, -1, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =5a(4) =17a(5) =38a(6) =143a(7) =373a(8) =1466a(9) =4154a(10) =16828a(11) =50791a(12) =210707a(13) =666064a(14) =2807184a(15) =9189830a(16) =39240386a(17) =132194457a(18) =570286809a(19) =1966064255a(20) =8552315969a(21) =30060812789a(22) =131683741780a(23) =470526690791
External references
- oeis: A148518