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 A051370 #12 Mar 19 2025 18:43:36 %S A051370 8,18,27,45,54,72,90,99,117,144,162,180,189,207,234,261,279,306,333, %T A051370 360,378,405,423,459,477,504,522,549,558,576,603,630,657,684,720,738, %U A051370 765,792,819,846,873,900,909,936,972,1008,1026,1053,1080,1098,1116 %N A051370 a(n+1) = a(n) + sum of digits of a(n)^2, with a(1) = 8. %t A051370 NestList[#+Total[IntegerDigits[#^2]]&,8,50] (* _Harvey P. Dale_, Aug 13 2015 *) %Y A051370 Cf. A033298. %K A051370 nonn,base,easy,less %O A051370 1,1 %A A051370 Miklos SZABO (mike(AT)ludens.elte.hu)