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), (-1, 0, 1), (1, -1, 0), (1, 1, 0)}.
A149137
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), (-1, 0, 1), (1, -1, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =9a(4) =36a(5) =107a(6) =447a(7) =1475a(8) =6348a(9) =22453a(10) =98409a(11) =363883a(12) =1617554a(13) =6174565a(14) =27735580a(15) =108449035a(16) =491170500a(17) =1956865329a(18) =8921660445a(19) =36085841451a(20) =165420054344a(21) =677458847443
External references
- oeis: A149137