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.

A089270 Positive numbers represented by the integer binary quadratic form x^2 + x*y - y^2 with x and y relatively prime.

Table of values

n a(n)
1 1
2 5
3 11
4 19
5 29
6 31
7 41
8 55
9 59
10 61
11 71
12 79
13 89
14 95
15 101
16 109
17 121
18 131
19 139
20 145
21 149
22 151
23 155
24 179
25 181
26 191
27 199
28 205
29 209
30 211
31 229
32 239
33 241
34 251
35 269
36 271
37 281
38 295
39 305
40 311
41 319
42 331
43 341
44 349
45 355
46 359
47 361
48 379
49 389
50 395
51 401
52 409
53 419
54 421
55 431

List of values

[1, 5, 11, 19, 29, 31, 41, 55, 59, 61, 71, 79, 89, 95, 101, 109, 121, 131, 139, 145, 149, 151, 155, 179, 181, 191, 199, 205, 209, 211, 229, 239, 241, 251, 269, 271, 281, 295, 305, 311, 319, 331, 341, 349, 355, 359, 361, 379, 389, 395, 401, 409, 419, 421, 431]

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

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