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 A380807 #6 Feb 04 2025 09:34:35 %S A380807 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,18,19,20,22,23,24,26,28,30,31, %T A380807 34,36,38,40,43,44,46,48,50,54,55,58,64,66,68,76,78,79,80,90,94,100, %U A380807 106,108,118,120,124,134,138,148,156,160,170,178,198,220,271,274,288,358,376,498,750,828 %N A380807 Numbers not of form a*(b+1) + b*(c+1) + c*(a+1) for 0<a<b<c. %Y A380807 Cf. A000926, A380806. %K A380807 nonn %O A380807 1,2 %A A380807 _Seiichi Manyama_, Feb 04 2025