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, 1)}.
A149784
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, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =19a(4) =81a(5) =349a(6) =1555a(7) =7053a(8) =32497a(9) =151005a(10) =708409a(11) =3344375a(12) =15879317a(13) =75743615a(14) =362725533a(15) =1742819393a(16) =8398499171a(17) =40573677013a(18) =196450014697a(19) =953043821113
External references
- oeis: A149784