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 A025197 #7 Aug 16 2019 21:25:23
%S A025197 0,0,1,4,8,16,27,43,64,92,128,172,227,294,373,467,576,703,849,1015,
%T A025197 1203,1414,1652,1916,2209,2533,2890,3282,3710,4177,4684,5234,5829,
%U A025197 6470,7161,7903,8698,9549,10458,11427,12458,13555,14719,15953,17259,18640,20098,21636,23257
%N A025197 a(n) = floor( Sum_{1 <= i < j <= n} ((sqrt(j)-sqrt(i))^3) ).
%K A025197 nonn
%O A025197 2,4
%A A025197 _Clark Kimberling_
%E A025197 a(45) corrected by _Sean A. Irvine_, Aug 16 2019