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, 1), (-1, 1, 1), (0, 1, 1), (1, 0, -1), (1, 0, 0)}.
A150290
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, 1), (-1, 1, 1), (0, 1, 1), (1, 0, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =23a(4) =93a(5) =390a(6) =1691a(7) =7543a(8) =34135a(9) =156398a(10) =725279a(11) =3391133a(12) =15954218a(13) =75517827a(14) =359295308a(15) =1716021026a(16) =8224494894a(17) =39546508613a(18) =190661813136a(19) =921316365597
External references
- oeis: A150290