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, 0), (1, 1, 1)}.
A149602
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, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =15a(4) =61a(5) =221a(6) =967a(7) =3881a(8) =16899a(9) =70221a(10) =315047a(11) =1354407a(12) =6082311a(13) =26520757a(14) =120929241a(15) =536544351a(16) =2448727261a(17) =10949317877a(18) =50429415865a(19) =227885979067
External references
- oeis: A149602