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), (0, 0, -1), (0, 1, 0), (0, 1, 1), (1, 0, 1)}.
A151132
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), (0, 0, -1), (0, 1, 0), (0, 1, 1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =3a(2) =11a(3) =45a(4) =198a(5) =887a(6) =4047a(7) =18768a(8) =87949a(9) =415183a(10) =1972722a(11) =9422395a(12) =45189129a(13) =217479786a(14) =1049796775a(15) =5080295503a(16) =24638793232a(17) =119724644589a(18) =582747344130
External references
- oeis: A151132