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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.

A227815 Composite numbers n divisible by their concatenated exponents in prime factorization.

Table of values

n a(n)
1 4
2 16
3 22
4 27
5 33
6 55
7 63
8 77
9 143
10 187
11 209
12 222
13 248
14 253
15 256
16 319
17 341
18 407
19 451
20 473
21 484
22 517
23 555
24 583
25 649
26 656
27 671
28 737
29 777
30 781
31 803
32 837
33 869
34 913
35 979
36 1067
37 1111
38 1133
39 1152
40 1177
41 1199
42 1221
43 1243
44 1397
45 1441
46 1443
47 1507
48 1529
49 1639
50 1661
51 1727

List of values

[4, 16, 22, 27, 33, 55, 63, 77, 143, 187, 209, 222, 248, 253, 256, 319, 341, 407, 451, 473, 484, 517, 555, 583, 649, 656, 671, 737, 777, 781, 803, 837, 869, 913, 979, 1067, 1111, 1133, 1152, 1177, 1199, 1221, 1243, 1397, 1441, 1443, 1507, 1529, 1639, 1661, 1727]

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

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