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, 1), (-1, 1, 1), (1, 0, 0), (1, 1, -1)}.
A148743
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, 1), (-1, 1, 1), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =7a(4) =27a(5) =74a(6) =317a(7) =996a(8) =4372a(9) =14829a(10) =67114a(11) =238443a(12) =1096888a(13) =4043925a(14) =18801767a(15) =71227050a(16) =334220773a(17) =1293673371a(18) =6108985871a(19) =24066116295a(20) =114253779505a(21) =456663608981
External references
- oeis: A148743