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, 1, 1), (0, -1, 1), (1, 0, -1), (1, 1, 0)}.
A149454
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, 1, 1), (0, -1, 1), (1, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =13a(4) =49a(5) =198a(6) =822a(7) =3529a(8) =15479a(9) =69033a(10) =311992a(11) =1426666a(12) =6580201a(13) =30587772a(14) =143122551a(15) =673348718a(16) =3183437184a(17) =15113727614a(18) =72019102558a(19) =344308018891
External references
- oeis: A149454