Irregular triangle of denominators of the average value of the first letter over all derangements of {1, 2, ..., n} with k descents.

A332010

Irregular triangle of denominators of the average value of the first letter over all derangements of {1, 2, ..., n} with k descents.

Terms

    a(0) =1a(1) =2a(2) =4a(3) =1a(4) =1a(5) =8a(6) =3a(7) =4a(8) =16a(9) =104a(10) =40a(11) =24a(12) =1a(13) =32a(14) =392a(15) =896a(16) =480a(17) =54a(18) =64a(19) =152a(20) =308a(21) =1496a(22) =63a(23) =108a(24) =1a(25) =128a(26) =2276a(27) =30384a(28) =14410a(29) =4315

External references