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 A167744 #7 Jun 26 2016 06:25:02 %S A167744 1,9,49,81,121,169,289,361,441,529,729,841,961,1089,1369,1521,1681, %T A167744 1849,2209,2401,2601,2809,3249,3481,3721,3969,4489,4761,5041,5329, %U A167744 5929,6241,6561,6889,7569,7921,8281,8649,9409,9801,10201,10609,11449,11881,12321 %N A167744 Squares that become a prime number when some single digit is inserted in front of its decimal expansion. %C A167744 The first numbers in A028375 but not in here are 12769, 15129, 18769, 22801, 26569 etc. - _R. J. Mathar_, Nov 12 2009 %K A167744 base,nonn %O A167744 1,2 %A A167744 _Claudio Meller_, Nov 10 2009 %E A167744 Extended by _R. J. Mathar_, Nov 12 2009