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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.

A221942 a(n) = floor(sqrt(5*2^n)).

Table of values

n a(n)
0 2
1 3
2 4
3 6
4 8
5 12
6 17
7 25
8 35
9 50
10 71
11 101
12 143
13 202
14 286
15 404
16 572
17 809
18 1144
19 1619
20 2289
21 3238
22 4579
23 6476
24 9158
25 12952
26 18317
27 25905
28 36635
29 51810
30 73271
31 103621
32 146542
33 207243
34 293085
35 414486
36 586171
37 828972
38 1172343
39 1657944
40 2344687
41 3315888
42 4689374
43 6631776
44 9378748
45 13263553
46 18757497
47 26527107

List of values

[2, 3, 4, 6, 8, 12, 17, 25, 35, 50, 71, 101, 143, 202, 286, 404, 572, 809, 1144, 1619, 2289, 3238, 4579, 6476, 9158, 12952, 18317, 25905, 36635, 51810, 73271, 103621, 146542, 207243, 293085, 414486, 586171, 828972, 1172343, 1657944, 2344687, 3315888, 4689374, 6631776, 9378748, 13263553, 18757497, 26527107]

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

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