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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.

A379600 a(n) is the semiperimeter of the primitive Pythagorean triangle (x(n), y(n), z(n)) with x(n) < y(n) < z(n) and x(n) > x(n-1), y(n) > y(n-1), z(n) > z(n-1), which has the smallest perimeter (if there are several triangles with smallest perimeter: the one of these with the smallest area), starting from a(1) = (3 + 4 + 5)/2 = 6.

Table of values

n a(n)
1 6
2 15
3 20
4 35
5 63
6 77
7 99
8 104
9 130
10 165
11 204
12 247
13 266
14 336
15 345
16 391
17 425
18 450
19 513
20 580
21 609
22 651
23 713
24 805
25 825
26 888
27 945
28 1036
29 1107
30 1204
31 1271
32 1376
33 1457
34 1530
35 1617
36 1645
37 1764
38 1887
39 1961
40 2014
41 2090
42 2280
43 2337
44 2419
45 2537
46 2562
47 2684
48 2772
49 2990
50 3149

List of values

[6, 15, 20, 35, 63, 77, 99, 104, 130, 165, 204, 247, 266, 336, 345, 391, 425, 450, 513, 580, 609, 651, 713, 805, 825, 888, 945, 1036, 1107, 1204, 1271, 1376, 1457, 1530, 1617, 1645, 1764, 1887, 1961, 2014, 2090, 2280, 2337, 2419, 2537, 2562, 2684, 2772, 2990, 3149]

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

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