Number of permutations of an n-sequence discordant with three given permutations (see reference) in n-6 places.

A000492

Number of permutations of an n-sequence discordant with three given permutations (see reference) in n-6 places.

Terms

    a(0) =20a(1) =154a(2) =1676a(3) =14292a(4) =155690a(5) =1731708a(6) =21264624a(7) =280260864a(8) =3970116255a(9) =60113625680a(10) =969368687752

External references