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, -1, 0), (-1, 1, 1), (0, 0, -1), (1, 0, 0)}.
A148237
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, -1, 0), (-1, 1, 1), (0, 0, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =13a(5) =36a(6) =105a(7) =314a(8) =1027a(9) =3472a(10) =11496a(11) =38293a(12) =131921a(13) =468959a(14) =1670355a(15) =5889236a(16) =21033673a(17) =76703347a(18) =282979446a(19) =1038776219a(20) =3810431891a(21) =14145279820a(22) =53158219229a(23) =200235425965a(24) =751569693745
External references
- oeis: A148237