The game of Mousetrap with n cards: the number of permutations of n cards having at least one hit after 2.

A002468

The game of Mousetrap with n cards: the number of permutations of n cards having at least one hit after 2.

Terms

    a(0) =0a(1) =0a(2) =1a(3) =3a(4) =13a(5) =65a(6) =397a(7) =2819a(8) =22831a(9) =207605a(10) =2094121a(11) =23205383a(12) =280224451a(13) =3662810249a(14) =51523391965a(15) =776082247979

External references