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 A133662 #12 Jan 14 2023 08:44:09 %S A133662 2,3,5,10,27,38,120,258,907,2030,3225,8295,15850,80642,378295,1049868, %T A133662 3031570,12565348,34530254,122586800,415026860,1454069870,4870827425, %U A133662 18129394322,77805478498 %N A133662 Lexically least increasing sequence such that the sum of any nonempty subsequence is not a square. %C A133662 a(26) <= 299244596987. - _Donovan Johnson_, Jan 30 2011 %e A133662 10 is here because none of 10, 10+2, 10+3, 10+5, 10+2+3, 10+2+5, 10+3+5 and 10+2+3+5 are square numbers. %Y A133662 Cf. A064776. %K A133662 nonn,more %O A133662 1,1 %A A133662 _Randy L. Ekl_, Dec 28 2007 %E A133662 Edited by _Don Reble_, Dec 30 2007 %E A133662 Definition corrected by _Don Reble_, Jan 01 2008 %E A133662 a(23)-a(25) from _Donovan Johnson_, Jan 30 2011