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.

A365516 Expansion of g.f. A(x) satisfying A(x) = (1 + 2*x*A(x))^2 / (1 + 2*x*A(x) - 2*x^3*A(x)^3).

Table of values

n a(n)
0 1
1 2
2 4
3 10
4 32
5 112
6 400
7 1464
8 5520
9 21296
10 83456
11 331136
12 1328320
13 5379200
14 21959936
15 90271904
16 373347840
17 1552438016
18 6486311680
19 27217331456
20 114649525760
21 484640538112
22 2055185596416
23 8740711936000
24 37273693649920
25 159340373710848
26 682708771254272
27 2931290431277056

List of values

[1, 2, 4, 10, 32, 112, 400, 1464, 5520, 21296, 83456, 331136, 1328320, 5379200, 21959936, 90271904, 373347840, 1552438016, 6486311680, 27217331456, 114649525760, 484640538112, 2055185596416, 8740711936000, 37273693649920, 159340373710848, 682708771254272, 2931290431277056]