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, 1), (1, 1, -1), (1, 1, 1)}.
A150981
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, 1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =36a(4) =173a(5) =769a(6) =3762a(7) =17511a(8) =86361a(9) =411423a(10) =2037985a(11) =9839317a(12) =48868281a(13) =237931344a(14) =1183748118a(15) =5796419938a(16) =28871992103a(17) =141951105936a(18) =707648354549
External references
- oeis: A150981