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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.

A216793 Numbers n such that gcd(sigma(n), n) > gcd(sigma(m), m) for all m < n.

Table of values

n a(n)
1 1
2 6
3 24
4 28
5 120
6 496
7 672
8 4320
9 4680
10 8128
11 26208
12 30240
13 32760
14 174592
15 199584
16 293760
17 435708
18 523776
19 2142720
20 2178540
21 8910720
22 17428320
23 20427264
24 23569920
25 33550336
26 45532800
27 91963648
28 142990848
29 459818240
30 1379454720
31 1476304896
32 6039429120

List of values

[1, 6, 24, 28, 120, 496, 672, 4320, 4680, 8128, 26208, 30240, 32760, 174592, 199584, 293760, 435708, 523776, 2142720, 2178540, 8910720, 17428320, 20427264, 23569920, 33550336, 45532800, 91963648, 142990848, 459818240, 1379454720, 1476304896, 6039429120]

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

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