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 A084966 #9 Feb 04 2025 11:34:58 %S A084966 1,2,3,3,3,2,3,3,3,4,3,4,3,3,3,3,3,3,3,3,3,3,3,4,4,3,3,3,3,3,3,3,3,3, %T A084966 3,3,3,3,3,3,3,3,3,3,3,3,3,4,4,3,3,3,3,4,3,3,3,3,3,4,3,3,3,3,3,3,3,3, %U A084966 3,3,3,3,3,3,3,3,3,4,3,3,3,3,3,3,3,3,3,3,3,3,4,3,3,3,3,4,4,3,3,3,3,3,3,3,3 %N A084966 Minimum numbers of squares needed to write n! as a sum of nonzero squares. %H A084966 Dario Alpern, <a href="https://www.alpertron.com.ar/FSQUARES.HTM">Sum of squares web application</a> %e A084966 a(2)=2 because 2!=1^2+1^2; a(3)=3: 3!=6=2^2+1+1; a(6)=2: 6!=720=24^2+12^2 %o A084966 (C) // See link. %Y A084966 Cf. A000142, A001481, A000419, A004215, A084953. %K A084966 nonn %O A084966 1,2 %A A084966 _Hugo Pfoertner_, Jun 15 2003