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.

A212205 G.f.: ((1+2*x)*sqrt(1-6*x^2+x^4)-1+5*x^2-2*x^3)/(2*x*(1-6*x^2)).

Table of values

n a(n)
0 1
1 1
2 2
3 4
4 8
5 18
6 36
7 86
8 172
9 426
10 852
11 2162
12 4324
13 11166
14 22332
15 58438
16 116876
17 309042
18 618084
19 1648154
20 3296308
21 8851206
22 17702412
23 47813790
24 95627580
25 259585002
26 519170004
27 1415431266
28 2830862532
29 7747200558
30 15494401116
31 42545600310
32 85091200620
33 234346445154
34 468692890308
35 1294260644906
36 2588521289812
37 7165245015510
38 14330490031020

List of values

[1, 1, 2, 4, 8, 18, 36, 86, 172, 426, 852, 2162, 4324, 11166, 22332, 58438, 116876, 309042, 618084, 1648154, 3296308, 8851206, 17702412, 47813790, 95627580, 259585002, 519170004, 1415431266, 2830862532, 7747200558, 15494401116, 42545600310, 85091200620, 234346445154, 468692890308, 1294260644906, 2588521289812, 7165245015510, 14330490031020]

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

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