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.
such that p+q = 2*k and that 2*k+p, 2*k+q, p*q-2*k and p*q+2*k are primes.
n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 15 |
3 | 315 |
4 | 420 |
5 | 825 |
6 | 2310 |
7 | 3150 |
8 | 1785 |
9 | 8925 |
10 | 6090 |
11 | 6405 |
12 | 8610 |
13 | 24990 |
14 | 19305 |
15 | 12705 |
16 | 14175 |
17 | 15015 |
18 | 18165 |
19 | 19635 |
20 | 24255 |
21 | 48510 |
22 | 63525 |
23 | 33915 |
24 | 48195 |
25 | 54285 |
26 | 35490 |
27 | 50505 |
28 | 55650 |
29 | 69615 |
30 | 71610 |
31 | 80850 |
32 | 78540 |
33 | 103740 |
34 | 39270 |
35 | 157920 |
36 | 60060 |
37 | 65835 |
38 | 90090 |
39 | 147840 |
40 | 120120 |
41 | 183645 |