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, 1, 0), (0, 0, -1), (0, 1, -1), (1, 0, 1)}.
A149331
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, 1, 0), (0, 0, -1), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =39a(5) =154a(6) =607a(7) =2337a(8) =9605a(9) =40746a(10) =169774a(11) =721592a(12) =3141676a(13) =13672351a(14) =59571861a(15) =263497047a(16) =1172340186a(17) =5211997832a(18) =23318908785a(19) =105062899783a(20) =473849638986
External references
- oeis: A149331