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 A092108 #37 May 11 2018 02:01:16 %S A092108 4,8,12,21,38,45,47,52,58,62,70,111,142,143,155,178,269,301,348,359, %T A092108 364,387,395,403,435,442,451,464,497,525,529,577,579,582,585,598,624, %U A092108 700,709,716,752,764,797,800,803,814,836,841,864,873,877,922,934,978,990 %N A092108 Numbers m such that m-th prime + m-th semiprime is prime. %C A092108 Resulting primes are: 17, 41, 71, 131, 281, 331, 353, 397, 449, 487, 563, 953, 1279, 1289, 1409, 1627. - _Zak Seidov_, May 08 2018 %H A092108 Charles R Greathouse IV, <a href="/A092108/b092108.txt">Table of n, a(n) for n = 1..10000</a> %e A092108 12 is a member because 12th prime is 37, 12th semiprime is 34 and 37 + 34 = 71 is prime. %t A092108 PrimeFactorExponentsAdded[n_] := Plus @@ Flatten[Table[ #[[2]], {1}] & /@ FactorInteger[n]]; sp = Select[Range[ 3700], PrimeFactorExponentsAdded[ # ] == 2 &]; p = Table[Prime[i], {i, Length[sp]}]; Select[ Range[ Length[sp]], PrimeQ[ sp[[ # ]] + p[[ # ]]] &] (* _Robert G. Wilson v_, Feb 24 2004 *) %t A092108 Module[{nn=5000,sms,prs,len},sms=Select[Range[nn],PrimeOmega[#]==2&];len = Length[sms];prs=Prime[Range[len]];Select[Table[{n,prs[[n]],sms[[n]]},{n,len}], PrimeQ[#[[2]]+#[[3]]]&][[All,1]]] (* _Harvey P. Dale_, Feb 28 2018 *) %Y A092108 Cf. A000040, A001358. %K A092108 nonn %O A092108 1,1 %A A092108 _Zak Seidov_, Feb 22 2004 %E A092108 More terms from _Robert G. Wilson v_ and _Ray Chandler_, Feb 24 2004