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, 0, 1), (1, 0, 0), (1, 1, -1), (1, 1, 1)}.
A150827
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, 0, 1), (1, 0, 0), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =31a(4) =144a(5) =632a(6) =3043a(7) =14030a(8) =68578a(9) =324399a(10) =1598367a(11) =7676905a(12) =38002101a(13) =184321377a(14) =915077196a(15) =4468167121a(16) =22224743494a(17) =109037604400a(18) =543057498579
External references
- oeis: A150827