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, 0), (1, 0, 1), (1, 1, -1), (1, 1, 1)}.
A151205
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, 0), (1, 0, 1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =3a(2) =12a(3) =54a(4) =249a(5) =1177a(6) =5636a(7) =27249a(8) =132741a(9) =649642a(10) =3191756a(11) =15726012a(12) =77663557a(13) =384258080a(14) =1903995456a(15) =9445840534a(16) =46908432474a(17) =233146909282
External references
- oeis: A151205