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.

A067400 Non-uniquely factorizable OR-numbrals, i.e., numbrals for which there exist more than one different factorizations into irreducible factors (modulo order).

Table of values

n a(n)
1 15
2 30
3 31
4 60
5 62
6 63
7 85
8 95
9 111
10 120
11 123
12 124
13 125
14 126
15 127
16 170
17 175
18 190
19 191
20 207
21 222
22 223
23 239
24 240
25 243
26 245
27 246
28 247
29 248
30 250
31 251
32 252
33 253
34 254
35 255
36 340
37 341
38 350
39 351
40 367
41 379
42 380
43 381
44 382
45 383
46 399
47 414
48 415
49 443
50 444
51 445
52 446
53 447

List of values

[15, 30, 31, 60, 62, 63, 85, 95, 111, 120, 123, 124, 125, 126, 127, 170, 175, 190, 191, 207, 222, 223, 239, 240, 243, 245, 246, 247, 248, 250, 251, 252, 253, 254, 255, 340, 341, 350, 351, 367, 379, 380, 381, 382, 383, 399, 414, 415, 443, 444, 445, 446, 447]

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

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