Number of ways of arranging the numbers 1..n in a circle so that adjacent numbers do not differ by 1 mod n.

A078603

Number of ways of arranging the numbers 1..n in a circle so that adjacent numbers do not differ by 1 mod n.

Terms

    a(0) =1a(1) =0a(2) =0a(3) =0a(4) =2a(5) =6a(6) =46a(7) =354a(8) =3106a(9) =29926a(10) =315862a(11) =3628906a(12) =45132474a(13) =604534846a(14) =8680957902a(15) =133082437730

External references