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, 1, 1), (1, -1, -1), (1, 1, -1)}.
A148892
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, 1, 1), (1, -1, -1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =31a(5) =100a(6) =421a(7) =1552a(8) =6762a(9) =26907a(10) =120089a(11) =500608a(12) =2276471a(13) =9796176a(14) =45167827a(15) =198958096a(16) =926982691a(17) =4156792143a(18) =19525807142a(19) =88793214818a(20) =419830105812
External references
- oeis: A148892