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 A069207 #6 Feb 11 2014 19:05:27 %S A069207 1,10,14,23,25,32,41,52,58,85,104,116,124,164,170,190,194,205,227,233, %T A069207 283,310,320,328,332,380,382,398,401,409,419,421,425,461,491,499,502, %U A069207 508,518,524,598,611,689,710,722,728,758,778,805,815,823,827,857,877 %N A069207 Numbers n such that n^2 + (reversal of n)^2 is prime. Ignore leading 0's. %H A069207 Vincenzo Librandi, <a href="/A069207/b069207.txt">Table of n, a(n) for n = 1..1000</a> %e A069207 14^2 + 41^2 = 1877, a prime, so 14 belongs to the sequence. %t A069207 Select[Range[10^3], PrimeQ[ #^2 + FromDigits[Reverse[IntegerDigits[ # ]]]^2] &] %K A069207 base,nonn %O A069207 1,2 %A A069207 _Joseph L. Pe_, Apr 10 2002