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.

A107665 Numbers with semiprime digits (digits 4, 6, 9 only).

Table of values

n a(n)
1 4
2 6
3 9
4 44
5 46
6 49
7 64
8 66
9 69
10 94
11 96
12 99
13 444
14 446
15 449
16 464
17 466
18 469
19 494
20 496
21 499
22 644
23 646
24 649
25 664
26 666
27 669
28 694
29 696
30 699
31 944
32 946
33 949
34 964
35 966
36 969
37 994
38 996
39 999
40 4444
41 4446
42 4449
43 4464
44 4466
45 4469
46 4494
47 4496
48 4499
49 4644
50 4646
51 4649
52 4664

List of values

[4, 6, 9, 44, 46, 49, 64, 66, 69, 94, 96, 99, 444, 446, 449, 464, 466, 469, 494, 496, 499, 644, 646, 649, 664, 666, 669, 694, 696, 699, 944, 946, 949, 964, 966, 969, 994, 996, 999, 4444, 4446, 4449, 4464, 4466, 4469, 4494, 4496, 4499, 4644, 4646, 4649, 4664]

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

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