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, 0), (0, 1, -1), (0, 1, 1), (1, 0, 1), (1, 1, 1)}.
A151227
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, 0), (0, 1, -1), (0, 1, 1), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =3a(2) =13a(3) =58a(4) =272a(5) =1292a(6) =6233a(7) =30279a(8) =148033a(9) =726688a(10) =3578955a(11) =17670025a(12) =87409934a(13) =433072383a(14) =2148368625a(15) =10668512572a(16) =53024146940a(17) =263727212519
External references
- oeis: A151227