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), (0, 0, 1), (0, 1, -1), (1, 0, -1)}.
A148587
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), (0, 0, 1), (0, 1, -1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =20a(5) =54a(6) =197a(7) =606a(8) =2327a(9) =7790a(10) =31007a(11) =109983a(12) =449032a(13) =1661627a(14) =6916014a(15) =26432615a(16) =111689208a(17) =437872815a(18) =1872854711a(19) =7494986572a(20) =32380670287a(21) =131800276738a(22) =574239393129
External references
- oeis: A148587