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.

A094425 Numbers n such that F_n(x) and F_n(1-x) have a common factor mod 2, with F_n(x) = U(n-1,x/2) the monic Chebyshev polynomials of second kind; this lists only the primitive elements of the set.

Table of values

n a(n)
1 5
2 6
3 17
4 31
5 33
6 63
7 127
8 129
9 171
10 257
11 511
12 683
13 2047
14 2731
15 2979
16 3277
17 3641
18 8191
19 28197
20 43691
21 48771
22 52429
23 61681
24 65537
25 85489
26 131071

List of values

[5, 6, 17, 31, 33, 63, 127, 129, 171, 257, 511, 683, 2047, 2731, 2979, 3277, 3641, 8191, 28197, 43691, 48771, 52429, 61681, 65537, 85489, 131071]

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

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