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, 0), (-1, -1, 1), (0, 0, -1), (0, 1, 0), (1, 1, 0)}.
A150084
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, 0), (-1, -1, 1), (0, 0, -1), (0, 1, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =19a(4) =65a(5) =233a(6) =865a(7) =3301a(8) =12875a(9) =51117a(10) =205976a(11) =840429a(12) =3466108a(13) =14428533a(14) =60553582a(15) =255966778a(16) =1088958246a(17) =4659451357a(18) =20040555293a(19) =86601741731a(20) =375841271002
External references
- oeis: A150084