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.

A173406 This sequence starts with any odd, composite number, like 15. There exists a power of two such that every 2^n + s_i is composite, where s_i is a term in the sequence less than 2^n. For example, 128+15=143, 512+15=527, 512+143=655, etc.

Table of values

n a(n)
1 15
2 143
3 527
4 655
5 1039
6 1167
7 1551
8 1679

List of values

[15, 143, 527, 655, 1039, 1167, 1551, 1679]

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

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