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 A227842 #10 Sep 13 2024 16:57:42
%S A227842 1,2,3,2,4,5,6,5,5,8,9,6,10,11,12,7,13,12,15,12,14,17,18,13,15,20,19,
%T A227842 16,22,21,24,17,21,26,27,18,26,29,28,21,29,28,33,28,30,33,36,27,31,34,
%U A227842 35,32,38,39,40,31,37,42,45,32,44,45,46,33,45,44,49,44,46,51,52,37,49,56,49,48,54,53,60,47
%N A227842 First differences of A014817.
%p A227842 A227842 := proc(n)
%p A227842 A014817(n+1)-A014817(n) ;
%p A227842 end proc:
%p A227842 seq(A227842(n),n=1..80) ; # _R. J. Mathar_, Aug 09 2013
%t A227842 Differences[Table[Sum[Floor[k^2/n],{k,n}],{n,100}]] (* _Harvey P. Dale_, Sep 13 2024 *)
%Y A227842 Cf. A014817, A227841.
%K A227842 nonn
%O A227842 1,2
%A A227842 _N. J. A. Sloane_, Aug 08 2013