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, 0, -1), (0, 0, 1), (1, -1, 0), (1, 1, 1)}.
A150455
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, 0, -1), (0, 0, 1), (1, -1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =25a(4) =95a(5) =384a(6) =1581a(7) =6650a(8) =28445a(9) =122882a(10) =536461a(11) =2362819a(12) =10471121a(13) =46690324a(14) =209233801a(15) =941662339a(16) =4255508597a(17) =19297965112a(18) =87782900607a(19) =400446990191
External references
- oeis: A150455