A353584 - cp's OEIS frontend

A353584 Denominators of coefficients c(n) in product expansion of 1 + tan x = Product_{k>=1} 1 + c(k)*x^k.

n	a(n)
1	1
2	1
3	3
4	3
5	15
6	15
7	315
8	105
9	567
10	405
11	155925
12	467775
13	1216215
14	34749
15	638512875
16	638512875
17	2170943775
18	32564156625
19	1856156927625
20	3093594879375
21	38979295480125
22	5568470782875
23	49308808782358125
24	2900518163668125
25	284473896821296875
26	1232720219558953125

[1, 1, 3, 3, 15, 15, 315, 105, 567, 405, 155925, 467775, 1216215, 34749, 638512875, 638512875, 2170943775, 32564156625, 1856156927625, 3093594879375, 38979295480125, 5568470782875, 49308808782358125, 2900518163668125, 284473896821296875, 1232720219558953125]

cp's OEIS Frontend

A353584 Denominators of coefficients c(n) in product expansion of 1 + tan x = Product_{k>=1} 1 + c(k)*x^k.

Table of values

List of values