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 A029555 #15 May 21 2013 11:16:56
%S A029555 143,17963,46943,64583,85877,128843,155933,208403,209933,1992383,
%T A029555 2155283,2237183,2973113,3535883,3697733,3834683,4858631,8060753,
%U A029555 10109093,11841383,12344813,13107263,15453383,16122653,16533749,18401183,18742823
%N A029555 Quasi-Carmichael numbers to base 8: squarefree composites n such that (n,2*3*5*7) = 1 and prime p|n ==> p-8|n-8.
%C A029555 If multiples of 2, 3, 5 and 7 are not excluded, then terms like 14, 35, 77, 110, 170, 273,... belong to the sequence. - _Giovanni Resta_, May 21 2013
%H A029555 Giovanni Resta, <a href="/A029555/b029555.txt">Table of n, a(n) for n = 1..589</a> (terms < 10^12)
%H A029555 <a href="/index/Ca#Carmichael">Index entries for sequences related to Carmichael numbers.</a>
%t A029555 qcm[n_, d_] := Block[{p, e}, {p, e} = Transpose@FactorInteger@n; Length[p] > 1 && Max[e] == 1 && d < Min[p] && And @@ IntegerQ /@ ((n - d)/(p - d))]; Select[Range[10^6], qcm[#, 8] &] (* _Giovanni Resta_, May 21 2013 *)
%K A029555 nonn
%O A029555 1,1
%A A029555 _David W. Wilson_