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 A048682 #9 May 13 2018 20:48:14
%S A048682 0,0,0,0,0,5,0,0,0,168,0,0,0,2145,2860,0,0,0,0,33592,117572,470288,0,
%T A048682 0,297160,4791705,2674440,12900240,28134060,10835415,0,0,0,2074316640,
%U A048682 0,0,2524661700,31810737420,39384722520,0,0,0,82334307276,1235014609140
%N A048682 a(n) is the difference between maximal and central squarefree kernel numbers dividing values of {binomial(n,k)} or A001405(n), respectively.
%e A048682 n=10: the squarefree kernels are {1, 10, 15, 30, 210, 42, 210, 30, 15, 10, 1}. The maximal value is 210 and the central one is 42. Thus a(10) = 210 - 42 = 168.
%Y A048682 Analogous cases for A001222, A000005 as applied to {binomial(n, k)} are given in A048623, A020740.
%K A048682 nonn
%O A048682 1,6
%A A048682 _Labos Elemer_