A175937 Number of lattice paths from (0,0) to (n,n) using steps S={(k,0),(0,k),(r,r)|0<k<=4,0<r<=2} which never go above the line y=x.

1, 2, 10, 62, 448, 3464, 28111, 236022, 2033145, 17867442, 159558635, 1443747386, 13207922431, 121962046864, 1135246916024, 10640772522150, 100346005711723, 951400275042466, 9063703952844960, 86718277215053218, 832901296331740527

Offset

0,2

Links

Table of n, a(n) for n=0..20.

Crossrefs

Cf. A175934, A175935, A175936, A175939

Sequence in context: A107026 A107841 A175936 * A175939 A192942 A307364

Adjacent sequences: A175934 A175935 A175936 * A175938 A175939 A175940

Keyword

nonn

Author

Eric Werley, Dec 06 2010

Status

approved