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 A337356 #16 Sep 12 2020 05:54:17 %S A337356 0,1,49,484,625,784,1296 %N A337356 Numbers whose digit sum of their square is equal to their square root. %F A337356 a(n) = A055575(n)^2. - _Joerg Arndt_, Sep 01 2020 %t A337356 Select[Range[0, 36], Plus @@ IntegerDigits[#^4] == # &]^2 (* _Amiram Eldar_, Sep 08 2020 *) %Y A337356 Cf. A055575. %K A337356 nonn,base,fini,full %O A337356 1,3 %A A337356 _Evzen Stejskal_, Aug 24 2020