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, -1, 0), (-1, 0, 1), (0, -1, 1), (1, 1, 0)}.
A149134
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, -1, 0), (-1, 0, 1), (0, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =9a(4) =34a(5) =110a(6) =386a(7) =1453a(8) =5156a(9) =20174a(10) =74994a(11) =293878a(12) =1140716a(13) =4472826a(14) =17816014a(15) =70468423a(16) =283996688a(17) =1137686308a(18) =4610999048a(19) =18688574722a(20) =76099976154a(21) =311108960790
External references
- oeis: A149134