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 A158342 #10 Jan 19 2025 12:09:36 %S A158342 29,31,179,181,269,271,809,811,1019,1021,1619,1621,1949,1951,2339, %T A158342 2341,2999,3001,3329,3331,3389,3391,3929,3931,4049,4051,4229,4231, %U A158342 4649,4651,5279,5281,5639,5641,5879,5881,6089,6091,6269,6271,6359,6361,6449,6451 %N A158342 List of twin primes p1 and p2 with odd sum of digits of p1 and even sum of digits of p2. %H A158342 Harvey P. Dale, <a href="/A158342/b158342.txt">Table of n, a(n) for n = 1..3000</a> %t A158342 Select[Partition[Prime[Range[1000]],2,1],#[[2]]-#[[1]]==2&&OddQ[Total[IntegerDigits[#[[1]]]]]&&EvenQ[Total[IntegerDigits[#[[2]]]]]&]//Flatten (* _Harvey P. Dale_, Jan 19 2025 *) %Y A158342 Cf. A077800. %K A158342 nonn,base,less %O A158342 1,1 %A A158342 _Juri-Stepan Gerasimov_, Mar 16 2009 %E A158342 Corrected (269,271 inserted, 1229,1231 removed, 3119,3121 removed...) by _R. J. Mathar_, May 19 2010