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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.

A277449 Numbers n such that there is exactly one nontrivial square n-gonal number.

Table of values

n a(n)
1 34
2 74
3 100
4 130
5 202
6 244
7 290
8 394
9 452
10 514
11 650
12 724
13 802
14 970
15 1060
16 1154
17 1354
18 1460
19 1570
20 1802
21 1924
22 2050
23 2314
24 2452
25 2594
26 2890
27 3044
28 3202
29 3364
30 3530
31 3700
32 3874
33 4234
34 4420
35 4610
36 5002
37 5204
38 5410
39 5834
40 6052
41 6274
42 6730
43 6964
44 7202
45 7690
46 7940
47 8194
48 8714
49 8980
50 9250
51 9802
52 10084
53 10370
54 10954
55 11252
56 11554
57 12170
58 12484
59 12802
60 13450
61 13780

List of values

[34, 74, 100, 130, 202, 244, 290, 394, 452, 514, 650, 724, 802, 970, 1060, 1154, 1354, 1460, 1570, 1802, 1924, 2050, 2314, 2452, 2594, 2890, 3044, 3202, 3364, 3530, 3700, 3874, 4234, 4420, 4610, 5002, 5204, 5410, 5834, 6052, 6274, 6730, 6964, 7202, 7690, 7940, 8194, 8714, 8980, 9250, 9802, 10084, 10370, 10954, 11252, 11554, 12170, 12484, 12802, 13450, 13780]

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

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