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.

A091461 Smallest number containing in its binary representation substrings forming an arithmetic progression exactly of size n.

Original entry on oeis.org

0, 3, 2, 6, 12, 75, 44, 92, 184, 1208, 1256, 4840, 4792, 36055, 9912, 19832, 39664, 563952, 576464, 4496112, 4499184
Offset: 1

Views

Author

Reinhard Zumkeller, Jan 12 2004

Keywords

Comments

A091460(a(n))=n and A091460(m)<>n for m

Examples

			a(7) = 44->'101100', {0+k*1: 0<=k<7}: bbbbb0 => 1bbbbb => 10bbbb => bb11bb => bbb100 => 101bbb => bb110b.
a(6) > 44: Although there is an arithmetic progression of length 6 in the binary expansion of 44, it is extendable (to length 7).

Extensions

a(12)-a(13) by Álvar Ibeas, Sep 09 2020
a(14)-a(21) by Álvar Ibeas, Sep 12 2020

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

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