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 A380806 #9 Feb 04 2025 14:45:21 %S A380806 1,2,3,4,5,7,8,10,11,14,16,19,20,26,31,34,40,44,55,76,80,94,124,160, %T A380806 170,220,271 %N A380806 Numbers not of form a*(b+1) + b*(c+1) + c*(a+1) for 1<=a<=b<=c. %Y A380806 Subsequence of A380807. %Y A380806 Cf. A025052. %K A380806 nonn,more %O A380806 1,2 %A A380806 _Seiichi Manyama_, Feb 04 2025