Number of derangements of n where minimal cycle size is at least 4.

A047865

Number of derangements of n where minimal cycle size is at least 4.

Terms

    a(0) =1a(1) =0a(2) =0a(3) =0a(4) =6a(5) =24a(6) =120a(7) =720a(8) =6300a(9) =58464a(10) =586656a(11) =6384960a(12) =76471560a(13) =994831200a(14) =13939507296a(15) =209097854784

External references