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.

A097275 Least integer "mod 2 prime signatures" k ordered by number of primitive Pythagorean triples with leg = k.

Table of values

n a(n)
0 1
1 2
2 3
3 6
4 4
5 12
6 18
7 8
8 15
9 60
10 30
11 9
12 24
13 105
14 420
15 54
16 16
17 36
18 120
19 840
20 4620
21 90
22 27
23 45
24 180
25 1155
26 9240
27 60060
28 162
29 32
30 48
31 240
32 1260
33 13860
34 120120
35 1021020
36 210
37 64
38 72
39 315
40 1680
41 15015
42 180180
43 2042040
44 19399380
45 270
46 81
47 96
48 360
49 2520
50 18480
51 240240

List of values

[1, 2, 3, 6, 4, 12, 18, 8, 15, 60, 30, 9, 24, 105, 420, 54, 16, 36, 120, 840, 4620, 90, 27, 45, 180, 1155, 9240, 60060, 162, 32, 48, 240, 1260, 13860, 120120, 1021020, 210, 64, 72, 315, 1680, 15015, 180180, 2042040, 19399380, 270, 81, 96, 360, 2520, 18480, 240240]

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

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