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, 0, 0), (0, -1, 0), (0, 1, -1), (1, 0, -1), (1, 1, 1)}.
A149759
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, 0, 0), (0, -1, 0), (0, 1, -1), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =19a(4) =71a(5) =287a(6) =1211a(7) =5209a(8) =22433a(9) =97741a(10) =431877a(11) =1921997a(12) =8605981a(13) =38690161a(14) =174755445a(15) =793122851a(16) =3611837535a(17) =16499831447a(18) =75559798515a(19) =346876213967
External references
- oeis: A149759