Number of walks of length n on cubic lattice, starting at origin, staying in first (nonnegative) octant.

A064036

Number of walks of length n on cubic lattice, starting at origin, staying in first (nonnegative) octant.

Terms

    a(0) =1a(1) =3a(2) =12a(3) =51a(4) =234a(5) =1110a(6) =5460a(7) =27405a(8) =140490a(9) =729918a(10) =3845016a(11) =20447658a(12) =109801692a(13) =593806356a(14) =3234529584a(15) =17715445605a(16) =97567971930a(17) =539701180590

External references