A145616 - cp's OEIS frontend

A145616 Denominator of the polynomial A_l(x) = sum_{d=1..l-1} x^(l-d)/d for index l=2n+1 evaluated at x=4.

n	a(n)
1	1
2	3
3	5
4	70
5	315
6	3465
7	45045
8	36036
9	51051
10	4849845
11	1616615
12	223092870
13	557732175
14	5019589575
15	145568097675
16	36100888223400
17	410237366175
18	410237366175
19	15178782548475
20	30357565096950
21	622330084487475

[1, 3, 5, 70, 315, 3465, 45045, 36036, 51051, 4849845, 1616615, 223092870, 557732175, 5019589575, 145568097675, 36100888223400, 410237366175, 410237366175, 15178782548475, 30357565096950, 622330084487475]

cp's OEIS Frontend

A145616 Denominator of the polynomial A_l(x) = sum_{d=1..l-1} x^(l-d)/d for index l=2n+1 evaluated at x=4.

Table of values

List of values