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.

A091012 Numbers having exactly one divisor d such that for some x also d-x and d+x are divisors.

Table of values

n a(n)
1 6
2 15
3 28
4 40
5 91
6 153
7 190
8 220
9 325
10 496
11 544
12 561
13 572
14 627
15 703
16 861
17 897
18 935
19 946
20 1012
21 1225
22 1287
23 1292
24 1431
25 1581
26 1610
27 1653
28 1768
29 1891
30 2278
31 2300
32 2465
33 2618
34 2701
35 2967
36 3321
37 3344
38 3496
39 3596
40 3655
41 3952
42 4123
43 4301
44 4324
45 4371

List of values

[6, 15, 28, 40, 91, 153, 190, 220, 325, 496, 544, 561, 572, 627, 703, 861, 897, 935, 946, 1012, 1225, 1287, 1292, 1431, 1581, 1610, 1653, 1768, 1891, 2278, 2300, 2465, 2618, 2701, 2967, 3321, 3344, 3496, 3596, 3655, 3952, 4123, 4301, 4324, 4371]

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

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