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 A295019 #9 Oct 27 2019 11:25:33 %S A295019 9,49,169,196,289,529,729,900,961,1089,1296,1369,1849,1936,2209,2809, %T A295019 2916,3249,3969,4096,4489,4900,5329,5929,6889,7396,7569,7921,8649, %U A295019 9025,9216,9409,9604,9801,10609,11449,12769,12996,13689,13924,15129,16129,16900,17689,17956,18496,18769 %N A295019 Squares whose largest digit is 9. %F A295019 a(n) = A295009(n)^2. %t A295019 Select[Range[150]^2,Max[IntegerDigits[#]]==9&] (* _Harvey P. Dale_, Oct 27 2019 *) %o A295019 (PARI) is_A295019(n)=issquare(n)&&n&&vecmax(digits(n))==9 \\ "&&n" avoids an error message for n=0. %Y A295019 Cf. A295009 (square roots of the terms), A277946 - A277948 (same for digit 2..4), A295015 - A295018 (same for digit 5..8). %Y A295019 Cf. A000290 (the squares). %K A295019 nonn,base %O A295019 1,1 %A A295019 _M. F. Hasler_, Nov 12 2017