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), (0, 1, -1), (1, -1, 1), (1, 0, 1)}.
A149042
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), (0, 1, -1), (1, -1, 1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =10a(4) =36a(5) =139a(6) =567a(7) =2354a(8) =10051a(9) =43745a(10) =192742a(11) =858883a(12) =3869637a(13) =17569721a(14) =80307106a(15) =369430312a(16) =1708635040a(17) =7938060632a(18) =37034246311a(19) =173437700581a(20) =814901766911
External references
- oeis: A149042