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, 0, 1), (-1, 1, 1), (0, 1, 1), (1, -1, 0), (1, 1, -1)}.
A149069
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, 0, 1), (-1, 1, 1), (0, 1, 1), (1, -1, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =11a(4) =42a(5) =173a(6) =741a(7) =3253a(8) =14584a(9) =66374a(10) =305929a(11) =1423054a(12) =6673810a(13) =31497144a(14) =149467879a(15) =712506548a(16) =3409806307a(17) =16372687478a(18) =78845089513a(19) =380654756327
External references
- oeis: A149069