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), (-1, 1, -1), (1, -1, 0), (1, 1, 0)}.
A149127
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), (-1, 1, -1), (1, -1, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =9a(4) =34a(5) =103a(6) =411a(7) =1367a(8) =5690a(9) =20373a(10) =87209a(11) =325633a(12) =1425794a(13) =5502425a(14) =24479132a(15) =96754681a(16) =436202352a(17) =1757717751a(18) =8004747055a(19) =32758213715a(20) =150479504960a(21) =623787052183
External references
- oeis: A149127