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), (0, -1, 1), (0, 1, -1), (0, 1, 1), (1, -1, 1)}.
A149394
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), (0, -1, 1), (0, 1, -1), (0, 1, 1), (1, -1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =50a(5) =185a(6) =780a(7) =3204a(8) =13813a(9) =59718a(10) =263526a(11) =1171897a(12) =5271023a(13) =23870426a(14) =108937335a(15) =499859830a(16) =2306602849a(17) =10690798311a(18) =49763016689a(19) =232479087714
External references
- oeis: A149394