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.

A031150 Appending a digit to n^2 gives another perfect square.

Table of values

n a(n)
1 1
2 2
3 4
4 5
5 6
6 12
7 18
8 43
9 80
10 154
11 191
12 228
13 456
14 684
15 1633
16 3038
17 5848
18 7253
19 8658
20 17316
21 25974
22 62011
23 115364
24 222070
25 275423
26 328776
27 657552
28 986328
29 2354785
30 4380794
31 8432812
32 10458821
33 12484830
34 24969660
35 37454490

List of values

[1, 2, 4, 5, 6, 12, 18, 43, 80, 154, 191, 228, 456, 684, 1633, 3038, 5848, 7253, 8658, 17316, 25974, 62011, 115364, 222070, 275423, 328776, 657552, 986328, 2354785, 4380794, 8432812, 10458821, 12484830, 24969660, 37454490]

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

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