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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.

A140744 Arises in enumerating iterated point-line configurations.

Table of values

n a(n)
1 4
2 4
3 4
4 4
5 5
6 5
7 6
8 6
9 7
10 8
11 9
12 10
13 11
14 13
15 14
16 16
17 19
18 22
19 26
20 30
21 36
22 43
23 52
24 63
25 77
26 95
27 119
28 151
29 193
30 249
31 326
32 433
33 583
34 795
35 1102
36 1551
37 2220
38 3233
39 4796
40 7254
41 11194
42 17643
43 28432
44 46898
45 79271
46 137464
47 244869
48 448658
49 846699
50 1648170
51 3314300
52 6895838

List of values

[4, 4, 4, 4, 5, 5, 6, 6, 7, 8, 9, 10, 11, 13, 14, 16, 19, 22, 26, 30, 36, 43, 52, 63, 77, 95, 119, 151, 193, 249, 326, 433, 583, 795, 1102, 1551, 2220, 3233, 4796, 7254, 11194, 17643, 28432, 46898, 79271, 137464, 244869, 448658, 846699, 1648170, 3314300, 6895838]

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

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