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 A177948 #4 Mar 30 2012 18:35:53 %S A177948 1,10,14,25,104,116,124,136,145,149,151,157,161,167,173,184,188,190, %T A177948 205,224,245,251,266,268,272,280,287,289,310,1006,1024,1036,1060,1070, %U A177948 1124,1150,1216,1220,1240,1244,1250,1286,1306,1310,1336,1366,1376,1406,1417 %N A177948 Numbers n such that n^2 + reverse of n^2 is a prime. %e A177948 116 is in the sequence, because 116^2 = 13456, and 13456 + 65431 = 78887 is a prime. %t A177948 Select[Range[2000], PrimeQ[(#)^2 + FromDigits[Reverse[IntegerDigits[(#)^2]]]] &] %Y A177948 Cf. A000040, A072366. %K A177948 nonn,base %O A177948 1,2 %A A177948 _Michel Lagneau_, May 15 2010