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, 1, 0), (0, 0, 1), (0, 1, 1), (1, 0, -1)}.
A150104
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, 1, 0), (0, 0, 1), (0, 1, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =19a(4) =68a(5) =255a(6) =989a(7) =3955a(8) =16147a(9) =67057a(10) =282495a(11) =1203909a(12) =5180147a(13) =22480686a(14) =98268169a(15) =432231388a(16) =1911944862a(17) =8499084865a(18) =37945861008a(19) =170096408313a(20) =765203667592
External references
- oeis: A150104