The game of Mousetrap with n cards (given n letters and n envelopes, how many ways are there to fill the envelopes so that at least one letter goes into its right envelope?).
A002467
The game of Mousetrap with n cards (given n letters and n envelopes, how many ways are there to fill the envelopes so that at least one letter goes into its right envelope?).
Terms
- a(0) =0a(1) =1a(2) =1a(3) =4a(4) =15a(5) =76a(6) =455a(7) =3186a(8) =25487a(9) =229384a(10) =2293839a(11) =25232230a(12) =302786759a(13) =3936227868a(14) =55107190151a(15) =826607852266
External references
- oeis: A002467