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), (0, -1, 1), (0, 1, 1), (1, 0, -1), (1, 1, 1)}.
A150997
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), (0, -1, 1), (0, 1, 1), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =38a(4) =172a(5) =794a(6) =3743a(7) =17869a(8) =86041a(9) =417015a(10) =2031338a(11) =9935278a(12) =48749417a(13) =239814236a(14) =1182228047a(15) =5838360564a(16) =28875208718a(17) =142989086008a(18) =708834332504
External references
- oeis: A150997