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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.

A280918 2nd term of the continued fraction for 2-sqrt(2)^^n, where x^^n denotes tetration.

Table of values

n a(n)
1 1
2 2
3 4
4 6
5 9
6 13
7 20
8 29
9 42
10 61
11 88
12 128
13 184
14 267
15 385
16 556
17 803
18 1159
19 1672
20 2413
21 3481
22 5023
23 7247
24 10456
25 15085
26 21764
27 31399
28 45299
29 65354
30 94286
31 136026
32 196245
33 283122
34 408459
35 589282
36 850155
37 1226515
38 1769487
39 2552830
40 3682956
41 5313383
42 7665592

List of values

[1, 2, 4, 6, 9, 13, 20, 29, 42, 61, 88, 128, 184, 267, 385, 556, 803, 1159, 1672, 2413, 3481, 5023, 7247, 10456, 15085, 21764, 31399, 45299, 65354, 94286, 136026, 196245, 283122, 408459, 589282, 850155, 1226515, 1769487, 2552830, 3682956, 5313383, 7665592]

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

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