cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A277520 Denominator of 3F2([3*n, -n, n+1],[2*n+1, n+1/2], 1).

Table of values

n a(n)
0 1
1 3
2 25
3 147
4 1089
5 20449
6 48841
7 312987
8 55190041
9 14322675
10 100100025
11 32065374675
12 4546130625
13 29873533563
14 1859904071089
15 4089135109921
16 9399479144449
17 22568149425822049
18 1293753708921104809
19 2835106739783283
20 3289668853728536041

List of values

[1, 3, 25, 147, 1089, 20449, 48841, 312987, 55190041, 14322675, 100100025, 32065374675, 4546130625, 29873533563, 1859904071089, 4089135109921, 9399479144449, 22568149425822049, 1293753708921104809, 2835106739783283, 3289668853728536041]