A353586 - cp's OEIS frontend

A353586 Numerators of coefficients c(n) in product expansion of (tan x)/x = Product_{k>=1} 1 + c(k)*x^(2k).

n	a(n)
1	1
2	2
3	1
4	53
5	91
6	811
7	73267
8	35540711
9	49830764
10	34241488
11	35249288479
12	19259769465311
13	732125336837021
14	619038578481164306
15	30015706187367326893
16	16177789439326291541
17	46789354983174555461
18	498213391899375541476686
19	248130101882943187003954597
20	2572596069535443792125179632949

[1, 2, 1, 53, 91, 811, 73267, 35540711, 49830764, 34241488, 35249288479, 19259769465311, 732125336837021, 619038578481164306, 30015706187367326893, 16177789439326291541, 46789354983174555461, 498213391899375541476686, 248130101882943187003954597, 2572596069535443792125179632949]

cp's OEIS Frontend

A353586 Numerators of coefficients c(n) in product expansion of (tan x)/x = Product_{k>=1} 1 + c(k)*x^(2k).

Table of values

List of values