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 A115662 #6 Oct 26 2020 18:09:02 %S A115662 12,13,15,16,17,21,23,26,28,31,32,36,37,39,45,51,54,56,57,58,61,62,63, %T A115662 65,68,69,71,73,75,79,82,85,86,93,96,97,107,108,113,115,116,117,122, %U A115662 123,125,128,129,132,135,143,144,149,153,155,156,157,158,159,162,163 %N A115662 Nonpalindromic n which have the same number of distinct prime divisors as the reverse of n. %H A115662 Harvey P. Dale, <a href="/A115662/b115662.txt">Table of n, a(n) for n = 1..1000</a> %e A115662 omega(16)=omega(61)=1. %t A115662 npnQ[n_]:=!PalindromeQ[n]&&PrimeNu[n]==PrimeNu[IntegerReverse[n]]; Select[ Range[ 200],npnQ] (* _Harvey P. Dale_, Oct 26 2020 *) %Y A115662 Cf. A001221, A115661. %K A115662 base,nonn %O A115662 1,1 %A A115662 _Giovanni Resta_, Jan 29 2006