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, 1, 1), (0, 0, 1), (1, 0, -1)}.
A148300
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, 1, 1), (0, 0, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =13a(5) =36a(6) =117a(7) =376a(8) =1268a(9) =4416a(10) =15530a(11) =56200a(12) =206917a(13) =771777a(14) =2918347a(15) =11132217a(16) =42902292a(17) =166855034a(18) =653846383a(19) =2580452228a(20) =10243450403a(21) =40893533547a(22) =164120740217a(23) =661823233025
External references
- oeis: A148300