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.

A177928 Let n be the number whose square n^2 has the decimal expansion { d(1) d(2) ... d(D) }, and let q be the corresponding number whose decimal expansion is { d(2) d(3) ... d(D) d(1)}. Sequence lists numbers n dividing q.

Table of values

n a(n)
1 1
2 2
3 3
4 9
5 27
6 33
7 66
8 99
9 123
10 246
11 271
12 333
13 351
14 407
15 429
16 462
17 481
18 518
19 546
20 567
21 666
22 693
23 702
24 715
25 777
26 814
27 819
28 924
29 936
30 999
31 1434
32 2151
33 2868
34 3333
35 4521
36 4818
37 6666
38 7227
39 7373
40 7535
41 8631
42 9042
43 9999
44 33333
45 53658
46 54546
47 66666
48 80487
49 81819

List of values

[1, 2, 3, 9, 27, 33, 66, 99, 123, 246, 271, 333, 351, 407, 429, 462, 481, 518, 546, 567, 666, 693, 702, 715, 777, 814, 819, 924, 936, 999, 1434, 2151, 2868, 3333, 4521, 4818, 6666, 7227, 7373, 7535, 8631, 9042, 9999, 33333, 53658, 54546, 66666, 80487, 81819]