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, 0, 1), (0, -1, 0), (1, 1, 0)}.
A149119
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, 0, 1), (0, -1, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =9a(4) =32a(5) =103a(6) =361a(7) =1291a(8) =4776a(9) =17539a(10) =67577a(11) =255967a(12) =1001804a(13) =3907961a(14) =15484786a(15) =61440637a(16) =246958922a(17) =990680625a(18) =4026610245a(19) =16324121493a(20) =66857579486a(21) =273568388471
External references
- oeis: A149119