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.

A138866 Concatenation of first 3 digits and last 3 digits of n-th Mersenne prime A000668(n).

Table of values

n a(n)
1 33
2 77
3 3131
4 127127
5 819191
6 131071
7 524287
8 214647
9 230951
10 618111
11 162127
12 170727
13 686151
14 531127
15 104087
16 147007
17 446351
18 259071
19 190991
20 285607
21 478111
22 346551
23 281191
24 431471
25 448751
26 402511
27 854671
28 536207
29 521007
30 512311
31 746447
32 174887
33 129591
34 412527
35 814711
36 623151
37 127271
38 437791
39 924071
40 125047
41 299407
42 122247
43 315871
44 124871
45 202927
46 169751
47 316511

List of values

[33, 77, 3131, 127127, 819191, 131071, 524287, 214647, 230951, 618111, 162127, 170727, 686151, 531127, 104087, 147007, 446351, 259071, 190991, 285607, 478111, 346551, 281191, 431471, 448751, 402511, 854671, 536207, 521007, 512311, 746447, 174887, 129591, 412527, 814711, 623151, 127271, 437791, 924071, 125047, 299407, 122247, 315871, 124871, 202927, 169751, 316511]

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

Content is available under The OEIS End-User License Agreement.