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, -1), (0, 1, -1), (1, -1, 1), (1, 1, 1)}.
A149639
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, -1), (0, 1, -1), (1, -1, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =15a(4) =69a(5) =261a(6) =1189a(7) =4997a(8) =23011a(9) =101409a(10) =474129a(11) =2142413a(12) =10136447a(13) =46598031a(14) =222214471a(15) =1035157901a(16) =4963828023a(17) =23358551315a(18) =112507014881a(19) =533522375907
External references
- oeis: A149639