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.
%I A382860 #8 Apr 13 2025 16:14:15 %S A382860 2,12,60,398,3780,36868,368904,3696883,36977302,369860633 %N A382860 Number of odd Ulam numbers <= 10^n. %C A382860 The percentage of odd Ulam numbers increases from 33.3333% (for N = 10) to 49.9962% (for N = 10^10) and approaches 50%. %H A382860 Shyam Sunder Gupta, <a href="https://doi.org/10.1007/978-981-97-2465-9_18">Ulam Numbers</a>. In: Exploring the Beauty of Fascinating Numbers. Springer Praxis Books(). Springer, Singapore, (2025). %Y A382860 Cf. A002858, A307331, A382797, A382861. %K A382860 nonn,more %O A382860 1,1 %A A382860 _Shyam Sunder Gupta_, Apr 07 2025