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.

A322189 G.f. A(x) satisfies: A(x)^2 + A(x) - 1 = Sum_{n>=0} binomial(3*n,n)^2 * x^n.

Table of values

n a(n)
0 1
1 3
2 72
3 2208
4 75531
5 2748957
6 104125542
7 4055630148
8 161248468944
9 6513248563281
10 266402605165194
11 11007646816287168
12 458676184166135532
13 19248392999470239126
14 812657808793768897362
15 34489498873811554580556
16 1470421670132406007539195
17 62941195430565633995463225
18 2703764557673857477236184014
19 116513978125127785773539029596

List of values

[1, 3, 72, 2208, 75531, 2748957, 104125542, 4055630148, 161248468944, 6513248563281, 266402605165194, 11007646816287168, 458676184166135532, 19248392999470239126, 812657808793768897362, 34489498873811554580556, 1470421670132406007539195, 62941195430565633995463225, 2703764557673857477236184014, 116513978125127785773539029596]