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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.

A100752 a(n) is the number of positive integers <= 10^n that are divisible by no prime exceeding 3.

Table of values

n a(n)
0 1
1 7
2 20
3 40
4 67
5 101
6 142
7 190
8 244
9 306
10 376
11 452
12 534
13 624
14 720
15 824
16 935
17 1052
18 1178
19 1309
20 1447
21 1593
22 1745
23 1905
24 2071
25 2244
26 2424
27 2611
28 2806
29 3006
30 3214
31 3429
32 3652
33 3881
34 4117
35 4360
36 4610
37 4866
38 5131
39 5401
40 5679
41 5964
42 6255
43 6553
44 6859
45 7172
46 7491

List of values

[1, 7, 20, 40, 67, 101, 142, 190, 244, 306, 376, 452, 534, 624, 720, 824, 935, 1052, 1178, 1309, 1447, 1593, 1745, 1905, 2071, 2244, 2424, 2611, 2806, 3006, 3214, 3429, 3652, 3881, 4117, 4360, 4610, 4866, 5131, 5401, 5679, 5964, 6255, 6553, 6859, 7172, 7491]

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

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