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), (-1, 1, 0), (0, 1, -1), (1, 0, 0)}.
A148512
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), (-1, 1, 0), (0, 1, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =5a(4) =17a(5) =36a(6) =128a(7) =327a(8) =1170a(9) =3455a(10) =12262a(11) =40081a(12) =142049a(13) =495130a(14) =1772625a(15) =6418214a(16) =23385253a(17) =86616111a(18) =321736427a(19) =1210203620a(20) =4573329384a(21) =17419545738a(22) =66751989887a(23) =257123568873a(24) =996294459849
External references
- oeis: A148512