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 A074980 #10 Feb 04 2025 20:12:08 %S A074980 6,10,14,34,42,46,50,58,62,66,70,78,82,86,90,102,110,114,122,130,134, %T A074980 158,162,166,178,182,194,202,206,210,214,226,230,234,238,246,250,254, %U A074980 258,266,274,278,290,302,306,310,314,322,326,330,338,354,358,374,378 %N A074980 Numbers which are not of the form m^p - n^q where p = 2 or 3, q = 2 or 3. %C A074980 This is a famous hard problem and the terms shown are only conjectured values. %C A074980 Checked for squares and cubes through 1.134*10^25. %H A074980 Alf van der Poorten, <a href="/A023057/a023057.txt">Remarks on the sequence of 'perfect' powers</a> %e A074980 146 is not in the sequence because 146 = 195^3-2723^2. %Y A074980 Cf. A074981. %K A074980 nonn %O A074980 1,1 %A A074980 _Zak Seidov_, Oct 07 2002 %E A074980 Corrected and extended by _Jud McCranie_, Oct 10 2002