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 A145395 #10 Dec 30 2024 02:12:53 %S A145395 0,1,2,4,5,6,8,9,10,12,13,14,15,16,17,18,20,21,22,24,25,26,27,28,29, %T A145395 30,32,33,34,35,36,37,38,39,40,41,42,44,45,46,48,49,50,51,52,53,54,55, %U A145395 56,57,58,60,61,62,63,64,65,66,68,69,70,72,73,74,75,76,77,78,80,81,82,84 %N A145395 Complement of the primes of form 4k+3 (A002145). %C A145395 Numbers n >= 0 such that (n + 1)*(2*r + n)/2 is a cube for some r >= 1. - _Ctibor O. Zizka_, Dec 28 2024 %F A145395 A079261(a(n)) = 0. %Y A145395 Cf. A002145, A039268, A079261. %K A145395 nonn %O A145395 1,3 %A A145395 _Reinhard Zumkeller_, Oct 12 2008