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), (-1, 1, -1), (0, 0, -1), (1, 0, 1)}.
A149124
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), (-1, 1, -1), (0, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =9a(4) =34a(5) =103a(6) =379a(7) =1309a(8) =4922a(9) =18125a(10) =69547a(11) =265723a(12) =1038766a(13) =4073721a(14) =16165622a(15) =64471827a(16) =259161978a(17) =1047151561a(18) =4255482729a(19) =17363577413a(20) =71174281416a(21) =292805890291
External references
- oeis: A149124