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 A297790 #29 Jun 18 2025 00:27:44 %S A297790 12,15,16,18,20,21,24,28,30,36,40,42,45,48,54,56,60,63,64,65,66,70,72, %T A297790 75,78,80,84,85,88,90,95,96,99,100,102,104,105,108,110,112,115,117, %U A297790 120,126,128,130,132,135,136,140,144,150,152,153,154,156,160,162,165,168,170,171,175,176,180,182,184,189,190,192,195,196,198,200,203,204,207,208,210,216,217,220,224,225,228,230,231,232,234,238 %N A297790 Areas of integer side-length cyclic quadrilaterals, excluding rectangles and kites with two right angles, with integer area. %H A297790 Daniel J Hardisky, <a href="/A297790/a297790.jpg">Omission of Area 64</a> %Y A297790 Cf. A298907, A298860, A210250, A230136, A131020, A218431, A219225, A233315, A242778, A273691, A273890. %K A297790 nonn %O A297790 1,1 %A A297790 _Gregory Gerard Wojnar_, Jan 28 2018 %E A297790 Name clarified by _Gregory Gerard Wojnar_, Oct 31 2018 %E A297790 Missing terms 64, 112, and 162 inserted by _Daniel J Hardisky_, Apr 24 2025