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, 1), (-1, 1, 1), (0, 1, -1), (1, -1, 0), (1, 0, 1)}.
A149462
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, 1), (-1, 1, 1), (0, 1, -1), (1, -1, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =13a(4) =51a(5) =205a(6) =863a(7) =3735a(8) =16485a(9) =74044a(10) =336717a(11) =1547700a(12) =7175187a(13) =33505829a(14) =157423145a(15) =743479522a(16) =3527237161a(17) =16799557266a(18) =80288255265a(19) =384876372364
External references
- oeis: A149462