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, 0, 0), (-1, 0, 1), (1, 0, -1), (1, 0, 1), (1, 1, 1)}.
A151027
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, 0, 0), (-1, 0, 1), (1, 0, -1), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =10a(3) =40a(4) =196a(5) =868a(6) =4296a(7) =19948a(8) =99144a(9) =470996a(10) =2346544a(11) =11302204a(12) =56384200a(13) =273994132a(14) =1367983448a(15) =6688214316a(16) =33408923728a(17) =164055354132a(18) =819743599992
External references
- oeis: A151027