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), (1, -1, 1), (1, 1, -1), (1, 1, 0)}.
A149411
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), (1, -1, 1), (1, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =52a(5) =199a(6) =895a(7) =3792a(8) =17523a(9) =77968a(10) =366808a(11) =1679585a(12) =7995678a(13) =37298169a(14) =179019270a(15) =845838011a(16) =4083954115a(17) =19474918120a(18) =94451708752a(19) =453524961665
External references
- oeis: A149411