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.

A190664 Least semiprime whose prime factors differ by 2*prime(n).

Table of values

n a(n)
1 21
2 55
3 39
4 51
5 203
6 87
7 111
8 123
9 371
10 183
11 335
12 395
13 623
14 267
15 291
16 327
17 1703
18 635
19 411
20 1043
21 447
22 815
23 1211
24 543
25 591
26 7223
27 1055
28 2951
29 1115
30 687
31 771
32 1883
33 831
34 843
35 4043
36 1535
37 951
38 1655
39 1011
40 1047
41 12059
42 1835
43 2723
44 1167
45 1191
46 1203
47 4763
48 1347

List of values

[21, 55, 39, 51, 203, 87, 111, 123, 371, 183, 335, 395, 623, 267, 291, 327, 1703, 635, 411, 1043, 447, 815, 1211, 543, 591, 7223, 1055, 2951, 1115, 687, 771, 1883, 831, 843, 4043, 1535, 951, 1655, 1011, 1047, 12059, 1835, 2723, 1167, 1191, 1203, 4763, 1347]

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

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