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.

A273359 Numbers k such that the decimal number concat(4,k) is a square.

Table of values

n a(n)
1 9
2 41
3 84
4 225
5 356
6 489
7 624
8 761
9 900
10 1209
11 1616
12 2025
13 2436
14 2849
15 3264
16 3681
17 4100
18 4521
19 4944
20 5369
21 5796
22 6225
23 6656
24 7089
25 7524
26 7961
27 8400
28 8841
29 9284
30 9729
31 10881
32 12164
33 13449
34 14736
35 16025
36 17316
37 18609
38 19904
39 21201
40 22500

List of values

[9, 41, 84, 225, 356, 489, 624, 761, 900, 1209, 1616, 2025, 2436, 2849, 3264, 3681, 4100, 4521, 4944, 5369, 5796, 6225, 6656, 7089, 7524, 7961, 8400, 8841, 9284, 9729, 10881, 12164, 13449, 14736, 16025, 17316, 18609, 19904, 21201, 22500]