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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.

A337390 Expansion of sqrt((1-2*x+sqrt(1-12*x+4*x^2)) / (2 * (1-12*x+4*x^2))).

Table of values

n a(n)
0 1
1 4
2 34
3 328
4 3334
5 34904
6 372436
7 4027216
8 43976774
9 483860632
10 5355697084
11 59569288816
12 665238165916
13 7454247891952
14 83769667651816
15 943744775565728
16 10655369806377542
17 120535523282756632
18 1365840013196530348
19 15500428304345011504
20 176148760580561346484

List of values

[1, 4, 34, 328, 3334, 34904, 372436, 4027216, 43976774, 483860632, 5355697084, 59569288816, 665238165916, 7454247891952, 83769667651816, 943744775565728, 10655369806377542, 120535523282756632, 1365840013196530348, 15500428304345011504, 176148760580561346484]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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