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, 0, 1), (1, -1, -1), (1, 0, -1), (1, 1, 0)}.
A148717
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, 0, 1), (1, -1, -1), (1, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =7a(4) =24a(5) =71a(6) =266a(7) =881a(8) =3469a(9) =12332a(10) =50040a(11) =186794a(12) =773667a(13) =2991999a(14) =12582929a(15) =49973205a(16) =212688321a(17) =862323174a(18) =3705563783a(19) =15273748851a(20) =66155435101a(21) =276381653991
External references
- oeis: A148717