A145614 - cp's OEIS frontend

A145614 Denominator of the polynomial A_l(x) = sum_{d=1..l-1} x^(l-d)/d for index l=2n+1 evaluated at x=3.

n	a(n)
1	2
2	4
3	20
4	280
5	280
6	3080
7	5720
8	2288
9	116688
10	3695120
11	25865840
12	594914320
13	2974571600
14	8923714800
15	86262576400
16	5348279736800
17	5348279736800
18	16044839210400
19	197886350261600
20	15222026943200
21	89157586381600

[2, 4, 20, 280, 280, 3080, 5720, 2288, 116688, 3695120, 25865840, 594914320, 2974571600, 8923714800, 86262576400, 5348279736800, 5348279736800, 16044839210400, 197886350261600, 15222026943200, 89157586381600]

cp's OEIS Frontend

A145614 Denominator of the polynomial A_l(x) = sum_{d=1..l-1} x^(l-d)/d for index l=2n+1 evaluated at x=3.

Table of values

List of values