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 A077111 #8 Mar 07 2022 15:49:20 %S A077111 0,0,-3,-1,-8,2,-9,15,0,-17,25,4,-19,-44,20,-9,-40,54,19,-18,-57,71, %T A077111 28,-17,-64,104,53,0,-55,-112,100,39,-24,-89,-156,106,35,-38,-113, %U A077111 -190,128,47,-36,-121,-208,172,81,-12,-107,-204,244,143,40,-65,-172 %N A077111 a(n) = A077110(n) - n^2. %C A077111 a(n)=0 iff n = m^(6*k). %F A077111 a(n) = if A075847(n) < A070923(n) then -A075847(n) else A070923(n). %e A077111 A077110(20)=343=7^3 is the nearest cube to 20^2=400, therefore a(20)=343-400=-57. %Y A077111 Cf. A000290, A077110, A077119. %K A077111 sign %O A077111 0,3 %A A077111 _Reinhard Zumkeller_, Oct 29 2002