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, 0, -1), (0, 1, 1), (1, 0, 1), (1, 1, 0)}.
A151143
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, 0, -1), (0, 1, 1), (1, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =3a(2) =11a(3) =47a(4) =201a(5) =909a(6) =4133a(7) =19193a(8) =89757a(9) =423745a(10) =2012129a(11) =9604685a(12) =46042409a(13) =221474919a(14) =1068632875a(15) =5169065599a(16) =25060228291a(17) =121725663315a(18) =592290443103
External references
- oeis: A151143