A098796 - cp's OEIS frontend

A098796 a(n) = (Catalan(P_n-1)+1)/P_n where P_n is the n-th prime and Catalan(k) is the Catalan number binomial(2k, k)/(k+1).

n	a(n)
1	1
2	1
3	3
4	19
5	1527
6	16001
7	2079863
8	25138879
9	3977502767
10	9094756956909
11	123064080712655
12	323237794212444689
13	63954318104304685581
14	908009997951266138587
15	185964440670918582766943
16	563569187656087282078158821
17	1764211191341056000567768115459

[1, 1, 3, 19, 1527, 16001, 2079863, 25138879, 3977502767, 9094756956909, 123064080712655, 323237794212444689, 63954318104304685581, 908009997951266138587, 185964440670918582766943, 563569187656087282078158821, 1764211191341056000567768115459]

cp's OEIS Frontend

A098796 a(n) = (Catalan(P_n-1)+1)/P_n where P_n is the n-th prime and Catalan(k) is the Catalan number binomial(2k, k)/(k+1).

Table of values

List of values