A119723 - cp's OEIS frontend

A119723 Numerator of Sum[ (-1)^(k-1) * 1/(Prime[k]-1)^2, {k,1,n}].

n	a(n)
1	1
2	3
3	13
4	113
5	2861
6	709
7	45601
8	408809
9	49595489
10	2426258561
11	485934733
12	485460413
13	2429223061
14	2427480661
15	1284905668069
16	217047437215261
17	182605590283392901
18	36508279615059377
19	36518889897389297

[1, 3, 13, 113, 2861, 709, 45601, 408809, 49595489, 2426258561, 485934733, 485460413, 2429223061, 2427480661, 1284905668069, 217047437215261, 182605590283392901, 36508279615059377, 36518889897389297]

cp's OEIS Frontend

A119723 Numerator of Sum[ (-1)^(k-1) * 1/(Prime[k]-1)^2, {k,1,n}].

Table of values

List of values