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 A066662 #6 Nov 01 2023 03:18:01 %S A066662 3,6,9,12,7,18,21,24,27,14,33,36,16,42,21,48,13,54,57,28,63,66,69,72, %T A066662 35,32,81,84,17,42,93,96,99,26,49,108,57,114,48,56,45,126,129,132,63, %U A066662 138,141,144,147,70,39,64,23,162,77,168,171,34,177,84,55,186,189,192 %N A066662 Shortest leg of a Pythagorean triangle with a hypotenuse of length 5n. %C A066662 a(n) has values in the range from sqrt(10n-1) to 3n (or, slightly weaker but prettier, in the range from 3*sqrt(n) to 3n). %e A066662 a(1)=3 because 3^2+4^2=(5*1)^2; a(2)=6 because 6^2+8^2=(5+2)^2; a(5)=7 since 7^2+24^2=(5*5)^2. %Y A066662 Cf. A036842, A055527. %K A066662 nonn %O A066662 1,1 %A A066662 _Henry Bottomley_, Jan 14 2002 %E A066662 Offset corrected by _Sean A. Irvine_, Nov 01 2023