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, 0, 1), (0, 0, -1), (0, 1, 1), (1, -1, 0)}.
A148938
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, 0, 1), (0, 0, -1), (0, 1, 1), (1, -1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =9a(4) =29a(5) =96a(6) =350a(7) =1292a(8) =4899a(9) =18831a(10) =74312a(11) =296745a(12) =1198823a(13) =4886726a(14) =20140263a(15) =83681564a(16) =350091692a(17) =1473326213a(18) =6238321647a(19) =26559287386a(20) =113604606928a(21) =487942278945
External references
- oeis: A148938