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 A129747 #6 Dec 27 2021 15:02:23 %S A129747 1,3,7,9,11,17,31,43,63,77,81,101,109,111,117,123,127,137,147,149,153, %T A129747 157,161,167,171,193,199,231,233,241,243,281,311,317,321,327,329,347, %U A129747 367,393,421,433,439,443,483,499,531,587,591,611,619,621,623,679,683 %N A129747 Numbers n such that the sum of the first n primes with the final digit 7 is prime. %H A129747 Harvey P. Dale, <a href="/A129747/b129747.txt">Table of n, a(n) for n = 1..1000</a> %F A129747 a(n)=primes in A030432 added to obtain A129079(n) %t A129747 Position[Accumulate[Select[Prime[Range[3000]],Mod[#,10]==7&]],_?(PrimeQ[ #]&)]//Flatten (* _Harvey P. Dale_, Dec 27 2021 *) %Y A129747 Cf. A129079; A000040; A030432. %K A129747 easy,base,less,nonn %O A129747 1,2 %A A129747 _Tomas Xordan_, May 14 2007