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.

Showing 1-1 of 1 results.

A382861 Number of even Ulam numbers <= 10^n.

Original entry on oeis.org

4, 14, 65, 429, 3804, 37216, 371464, 3702470, 36999540, 369917405
Offset: 1

Views

Author

Shyam Sunder Gupta, Apr 07 2025

Keywords

Comments

The percentage of even Ulam numbers is decreasing from 66.66667% (for N = 10) to 50.00038% (for N = 10^10) and approaching 50%.

Links

  • Shyam Sunder Gupta, Ulam Numbers. In: Exploring the Beauty of Fascinating Numbers. Springer Praxis Books(). Springer, Singapore, (2025).

Crossrefs

Cf. A002858, A307331, A382798, A382860.
Showing 1-1 of 1 results.

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

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