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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.

A128166 Numbers k such that k divides 1 + Sum_{j=1..k} prime(j)^2 = 1 + A024450(k).

Table of values

n a(n)
1 1
2 2
3 3
4 4
5 6
6 9
7 12
8 13
9 26
10 28
11 45
12 66
13 174
14 308
15 350
16 366
17 417
18 783
19 804
20 3774
21 5714
22 7998
23 17628
24 17940
25 63447
26 67620
27 83028
28 137868
29 216717
30 297486
31 425708
32 659316
33 674166
34 883500
35 1203786
36 3605052
37 6778607
38 9516098
39 19964862
40 25338586
41 27771732
42 70980884
43 91871891
44 208234138
45 231967260
46 238066596
47 289829748
48 784027092
49 1078515812
50 33256634230

List of values

[1, 2, 3, 4, 6, 9, 12, 13, 26, 28, 45, 66, 174, 308, 350, 366, 417, 783, 804, 3774, 5714, 7998, 17628, 17940, 63447, 67620, 83028, 137868, 216717, 297486, 425708, 659316, 674166, 883500, 1203786, 3605052, 6778607, 9516098, 19964862, 25338586, 27771732, 70980884, 91871891, 208234138, 231967260, 238066596, 289829748, 784027092, 1078515812, 33256634230]

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

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