A087178 - cp's OEIS frontend

A087178 ((1/2)/p^2)*(T(p)-1) where p runs through the prime >= 5 and T(k) is the k-th central trinomial number (A002426).

n	a(n)
1	1
2	4
3	106
4	630
5	26185
6	178666
7	8991709
8	3678166249
9	28031525940
10	13143231877116
11	824038411943548
12	6585233816779471
13	427212999940414402
14	230740449590738871715
15	128696758387000610268418
16	1065763722815793191814814
17	614675485079469646826034034

[1, 4, 106, 630, 26185, 178666, 8991709, 3678166249, 28031525940, 13143231877116, 824038411943548, 6585233816779471, 427212999940414402, 230740449590738871715, 128696758387000610268418, 1065763722815793191814814, 614675485079469646826034034]

cp's OEIS Frontend

A087178 ((1/2)/p^2)*(T(p)-1) where p runs through the prime >= 5 and T(k) is the k-th central trinomial number (A002426).

Table of values

List of values