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 A053020 #39 Aug 24 2020 02:07:27 %S A053020 319,372,492,703,865,954,1584,1842,2112,2118,2418,2569,2575,2899,2905, %T A053020 3078,3432,3438,4212,4218,4423,4429,5341,5815,5821,6066,6072,6323, %U A053020 6329,6592,7132,7967,7973,8254,8260,8266,9502,9508,9514,9839,9845,10176,10182,11225,11231 %N A053020 Numbers which, when expressed as a sum of distinct primes with maximum product, use a non-maximal number of primes. %D A053020 R. K. Guy, Unsolved Problems Number Theory, 2nd edition, Springer, 1994, F19. %H A053020 Adam Atkinson, <a href="/A053020/b053020.txt">Table of n, a(n) for n = 1..444</a> %H A053020 Adam Atkinson, <a href="http://www.ghira.mistral.co.uk/maths/A053020/">Sequence A053020</a> %H A053020 Adam Atkinson, <a href="/A053020/a053020.pdf">Sequence A053020</a> [Local copy, in pdf format, with permission] %e A053020 10 is not in the sequence because 5+3+2 has maximum product AND uses the maximum number of primes (3). (10 = 7+3 is worse in both senses). 319 is the first number for which there's a difference. %o A053020 (Perl) # See Atkinson link %K A053020 nonn %O A053020 1,1 %A A053020 _Adam Atkinson_, Feb 23 2000 %E A053020 More terms from _Adam Atkinson_, Aug 23 2020