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 A090700 #14 Aug 26 2025 00:37:31 %S A090700 2,5,19,31,43,61,103,103,139,151,199,229,283,313,421,421,523,523,643, %T A090700 661,811,811,1021,1021,1231,1231,1429,1429,1609,1621,1873,1873,2143, %U A090700 2239,2551,2551,2791,2791,3121,3121,3463,3463,3853,3853,4243,4261,4723 %N A090700 a(n) is the smallest number which is simultaneously a prime, the sum of 2 distinct primes, the sum of 3 distinct primes, ... and the sum of n distinct primes. %H A090700 David A. Corneth, <a href="/A090700/b090700.txt">Table of n, a(n) for n = 1..570</a> %e A090700 a(5)=43 because 43 = 41 + 2 = 31 + 7 + 5 = 31 + 7 + 3 + 2 = 17 + 11 + 7 + 5 + 3. %K A090700 nonn,changed %O A090700 1,1 %A A090700 _Jon Perry_, Jan 11 2004 %E A090700 Extended through a(5) by Gershon Bialer (gersh(AT)bialer.com), Jan 11 2004 %E A090700 Extended through a(18) by _Don Reble_, Jan 12 2004 %E A090700 Terms a(19) onwards from _Ray Chandler_, May 01 2007