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), (-1, 1, 1), (1, -1, 0), (1, 0, 0), (1, 1, -1)}.
A148748
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), (-1, 1, 1), (1, -1, 0), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =7a(4) =27a(5) =89a(6) =379a(7) =1434a(8) =6357a(9) =25859a(10) =117728a(11) =501852a(12) =2326645a(13) =10236710a(14) =48059944a(15) =216270052a(16) =1024886565a(17) =4690124264a(18) =22386167403a(19) =103772551749a(20) =498108277352
External references
- oeis: A148748