A145626 - cp's OEIS frontend

A145626 Denominator of the polynomial A_l(x) = sum_{d=1..l-1} x^(l-d)/d for index l=2n+1 evaluated at x=9.

n	a(n)
1	2
2	4
3	20
4	280
5	280
6	3080
7	40040
8	16016
9	272272
10	25865840
11	25865840
12	594914320
13	2974571600
14	2974571600
15	86262576400
16	5348279736800
17	5348279736800
18	5348279736800
19	10415071066400
20	10415071066400
21	427017913722400

[2, 4, 20, 280, 280, 3080, 40040, 16016, 272272, 25865840, 25865840, 594914320, 2974571600, 2974571600, 86262576400, 5348279736800, 5348279736800, 5348279736800, 10415071066400, 10415071066400, 427017913722400]

cp's OEIS Frontend

A145626 Denominator of the polynomial A_l(x) = sum_{d=1..l-1} x^(l-d)/d for index l=2n+1 evaluated at x=9.

Table of values

List of values