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, 0), (-1, 0, -1), (0, -1, -1), (0, 0, 1), (1, 1, 0)}.
A149983
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, 0), (-1, 0, -1), (0, -1, -1), (0, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =17a(4) =55a(5) =200a(6) =737a(7) =2782a(8) =10881a(9) =42496a(10) =171031a(11) =688475a(12) =2817527a(13) =11609784a(14) =48126841a(15) =201562885a(16) =845539099a(17) =3580412372a(18) =15187225367a(19) =64821446779a(20) =277615705565
External references
- oeis: A149983