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), (-1, 1, 0), (1, -1, -1), (1, 0, 1)}.
A148658
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), (-1, 1, 0), (1, -1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =25a(5) =65a(6) =263a(7) =818a(8) =3460a(9) =11295a(10) =49589a(11) =171337a(12) =756364a(13) =2728977a(14) =12218413a(15) =45154693a(16) =204526668a(17) =774395008a(18) =3523749667a(19) =13608411568a(20) =62334220137a(21) =244098295369
External references
- oeis: A148658