Number of ways to arrange n books on 4 consecutive bookshelves, leaving no shelf empty.

A200979

Number of ways to arrange n books on 4 consecutive bookshelves, leaving no shelf empty.

Terms

    a(0) =24a(1) =480a(2) =7200a(3) =100800a(4) =1411200a(5) =20321280a(6) =304819200a(7) =4790016000a(8) =79035264000

External references