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.

A219391 Numbers k such that 21*k + 1 is a square.

Table of values

n a(n)
1 0
2 3
3 8
4 19
5 23
6 40
7 55
8 80
9 88
10 119
11 144
12 183
13 195
14 240
15 275
16 328
17 344
18 403
19 448
20 515
21 535
22 608
23 663
24 744
25 768
26 855
27 920
28 1015
29 1043
30 1144
31 1219
32 1328
33 1360
34 1475
35 1560
36 1683
37 1719
38 1848
39 1943
40 2080
41 2120
42 2263
43 2368
44 2519
45 2563
46 2720
47 2835
48 3000
49 3048
50 3219

List of values

[0, 3, 8, 19, 23, 40, 55, 80, 88, 119, 144, 183, 195, 240, 275, 328, 344, 403, 448, 515, 535, 608, 663, 744, 768, 855, 920, 1015, 1043, 1144, 1219, 1328, 1360, 1475, 1560, 1683, 1719, 1848, 1943, 2080, 2120, 2263, 2368, 2519, 2563, 2720, 2835, 3000, 3048, 3219]

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

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