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, 1), (0, 0, 1), (1, -1, 0), (1, 1, -1), (1, 1, 0)}.
A150657
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, 1), (0, 0, 1), (1, -1, 0), (1, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =28a(4) =120a(5) =533a(6) =2434a(7) =11333a(8) =53506a(9) =255229a(10) =1227000a(11) =5935322a(12) =28852938a(13) =140820142a(14) =689529978a(15) =3385401557a(16) =16658845955a(17) =82130513718a(18) =405568719091
External references
- oeis: A150657