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.

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A382860 Number of odd Ulam numbers <= 10^n.

Original entry on oeis.org

2, 12, 60, 398, 3780, 36868, 368904, 3696883, 36977302, 369860633
Offset: 1

Views

Author

Shyam Sunder Gupta, Apr 07 2025

Keywords

Comments

The percentage of odd Ulam numbers increases from 33.3333% (for N = 10) to 49.9962% (for N = 10^10) and approaches 50%.

Links

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

Crossrefs

Cf. A002858, A307331, A382797, A382861.
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