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 A004087 #37 Jun 24 2022 20:14:26 %S A004087 2,3,5,7,11,31,71,91,32,92,13,73,14,34,74,35,95,16,76,17,37,97,38,98, %T A004087 79,101,301,701,901,311,721,131,731,931,941,151,751,361,761,371,971, %U A004087 181,191,391,791,991,112,322,722,922,332,932,142,152,752,362,962,172 %N A004087 Primes written backwards. %H A004087 R. Zumkeller, <a href="/A004087/b004087.txt">Table of n, a(n) for n = 1..10000</a> %F A004087 a(n) = A004086(A000040(n)) = A000040(n) - A068396(n). - _N. J. A. Sloane_, Jun 29 2008 %F A004087 a(n) = A188649(A000040(n)). - _Reinhard Zumkeller_, Apr 11 2011 %F A004087 a(n) = A071786(A000040(n)). - _Reinhard Zumkeller_, Oct 14 2011 %t A004087 FromDigits[Reverse[IntegerDigits[#]]]&/@Prime[Range[100]] (* _Vincenzo Librandi_, Jul 05 2015 *) %o A004087 (Haskell) %o A004087 a004087 n = a004087_list !! (n-1) %o A004087 a004087_list = map a004086 a000040_list %o A004087 -- _Reinhard Zumkeller_, Oct 14 2011 %o A004087 (Magma) [Seqint(Reverse(Intseq(NthPrime(n)))): n in [1..60]]; // _Vincenzo Librandi_, Jan 21 2016 %o A004087 (Python) %o A004087 from sympy import primerange %o A004087 print([int(str(p)[::-1]) for p in primerange(2, 272)]) # _Michael S. Branicky_, Jun 24 2022 %Y A004087 Cf. A000040. %K A004087 nonn,base,look %O A004087 1,1 %A A004087 _N. J. A. Sloane_ %E A004087 More terms from _Eric M. Schmidt_, Apr 04 2014