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 A085434 #7 Mar 12 2025 08:14:55
%S A085434 46,74,94,106,134,158,166,178,194,226,254,262,314,326,334,346,422,446,
%T A085434 466,502,514,526,554,586,614,634,662,674,706,718,734,746,758,766,778,
%U A085434 794,802,818,878,886,898,914,934,958,974,982,998,1006,1018,1082,1094
%N A085434 Twice odd isolated primes.
%C A085434 Name was: n-th even number not a power of 2 whose largest and smallest factors do not add or subtract to a twin prime. - _Robert Israel_, Mar 11 2025
%C A085434 The density of these numbers approach 0 as n approaches oo.
%F A085434 a(n) = 2 * A134797(n).
%p A085434 P:= select(isprime, {seq(i,i=3..1000,2)}):
%p A085434 A:= P minus (P +~ 2) minus (P -~ 2):
%p A085434 sort(convert(A,list)) *~ 2; # _Robert Israel_, Mar 11 2025
%o A085434 (PARI) maxpmmintwin(n) = { c=0; forprime(p=3,n, if(!isprime(p-2) & !isprime(p+2),print1(p+p","); c++); ); print(); print(c" "c/n+.0) }
%Y A085434 Cf. A052369, A056608, A134797.
%K A085434 easy,nonn
%O A085434 6,1
%A A085434 _Cino Hilliard_, Aug 13 2003
%E A085434 Definition corrected by _Robert Israel_, Mar 11 2025