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, -1), (0, 1, 1), (1, -1, 0), (1, 0, 0)}.
A150023
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, -1), (0, 1, 1), (1, -1, 0), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =18a(4) =67a(5) =258a(6) =1054a(7) =4397a(8) =18726a(9) =81161a(10) =357501a(11) =1591280a(12) =7141591a(13) =32375055a(14) =147738932a(15) =677987483a(16) =3129540083a(17) =14517637716a(18) =67614550769a(19) =316096156970
External references
- oeis: A150023