A111877 - cp's OEIS frontend

A111877 a(n) = denominator of 3Sum_{j=0..n+1} 1/(2j+1).

n	a(n)
0	1
1	5
2	35
3	105
4	1155
5	15015
6	15015
7	255255
8	4849845
9	4849845
10	111546435
11	557732175
12	1673196525
13	48522699225
14	1504203675975
15	1504203675975
16	1504203675975
17	55655536011075
18	55655536011075
19	2281876976454075
20	98120709987525225

[1, 5, 35, 105, 1155, 15015, 15015, 255255, 4849845, 4849845, 111546435, 557732175, 1673196525, 48522699225, 1504203675975, 1504203675975, 1504203675975, 55655536011075, 55655536011075, 2281876976454075, 98120709987525225]

cp's OEIS Frontend

A111877 a(n) = denominator of 3Sum_{j=0..n+1} 1/(2j+1).

Table of values

List of values

cp's OEIS Frontend

A111877 a(n) = denominator of 3*Sum_{j=0..n+1} 1/(2*j+1).

Table of values

List of values

A111877 a(n) = denominator of 3Sum_{j=0..n+1} 1/(2j+1).