A281070 - cp's OEIS frontend

A281070 a(n) is the numerator of 6 * Sum_{k=0..n} ((k+1)/(n-k+1)^2) * (Catalan(k)/(2^(2*k+1)))^2.

n	a(n)
0	3
1	9
2	109
3	1037
4	91027
5	1540981
6	447810157
7	147053171
8	503445581741
9	16337573574319
10	88973047698967
11	3588920671411951
12	2314594755016141847
13	20685050199210758743
14	2160689714871889935101
15	121435710295138581181033
16	16427863327419202412927713

[3, 9, 109, 1037, 91027, 1540981, 447810157, 147053171, 503445581741, 16337573574319, 88973047698967, 3588920671411951, 2314594755016141847, 20685050199210758743, 2160689714871889935101, 121435710295138581181033, 16427863327419202412927713]

cp's OEIS Frontend

A281070 a(n) is the numerator of 6 * Sum_{k=0..n} ((k+1)/(n-k+1)^2) * (Catalan(k)/(2^(2*k+1)))^2.

Table of values

List of values