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 A141544 #17 Jul 26 2025 10:27:53 %S A141544 1,3,7,9,13,19,21,27,31,33,37,39,49,51,61,63,67,73,79,81,87,93,97,103, %T A141544 109,111,117,123,129,133,139,151,153,163,171,177,181,187,189,207,213, %U A141544 217,219,229,231,237,241,243,247,249,259,271,279,283,291,297,301,307 %N A141544 Odd numbers k such that 2k+5 is a prime. %C A141544 Superset of A107771. The corresponding primes are given by deleting the first entry in A002145. - _R. J. Mathar_, Aug 18 2008 %F A141544 A089038 INTERSECT A005408. - _R. J. Mathar_, Aug 18 2008 %F A141544 a(n) = A087915(n+1) - 1 = A090670(n+1) - 4. - _Giovanni Teofilatto_, Sep 07 2008 %p A141544 a:=proc(n) if isprime(2*n+5) then n end if end proc: seq(a(2*n-1), n=1..170); # _Emeric Deutsch_, Aug 17 2008 %t A141544 Select[Range[1,307,2],PrimeQ[2#+5]&] (* _James C. McMahon_, Jul 26 2025 *) %Y A141544 Cf. A002145, A020498, A087915, A089038, A090670, A107771. %K A141544 nonn %O A141544 1,2 %A A141544 _Giovanni Teofilatto_, Aug 16 2008 %E A141544 Extended by _Emeric Deutsch_, Aug 17 2008 and _R. J. Mathar_, Aug 18 2008