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 A071589 #13 Apr 07 2021 20:36:35 %S A071589 12,13,14,15,16,17,18,19,23,24,25,26,27,28,29,34,35,36,37,38,39,45,46, %T A071589 47,48,49,56,57,58,59,67,68,69,78,79,89,102,103,104,105,106,107,108, %U A071589 109,112,113,114,115,116,117,118,119,122,123,124,125,126,127,128,129 %N A071589 Numbers n such that Reversal(n) > n. %H A071589 T. D. Noe, <a href="/A071589/b071589.txt">Table of n, a(n) for n = 1..1000</a> %t A071589 Select[Range[200], # < FromDigits[Reverse[IntegerDigits[#]]] &] (* _T. D. Noe_, Mar 14 2012 *) %o A071589 (PARI) for(i=2,300,n=(i); s=ceil(log(n)/log(10)); if((sum(i=0,s,10^(s-i-1)*(floor(n/10^i*1.)-10*floor(n/10^(i+1)*1.))))>i,print1((i),","))) %Y A071589 Cf. A004086 (digit reversal), A071590 (reversal < n), A002113 (reversal = n). %Y A071589 Cf. A161601 (binary reversal > n). %K A071589 base,easy,nonn %O A071589 1,1 %A A071589 _Benoit Cloitre_, Jun 01 2002