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), (0, -1, 1), (1, 0, -1), (1, 1, 0)}.
A149266
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), (0, -1, 1), (1, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =11a(4) =40a(5) =145a(6) =557a(7) =2204a(8) =8878a(9) =36670a(10) =153158a(11) =649421a(12) =2779083a(13) =12009927a(14) =52301065a(15) =229322103a(16) =1011602788a(17) =4485941698a(18) =19989047298a(19) =89445085086a(20) =401786301272
External references
- oeis: A149266