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 A199801 #14 Nov 11 2013 21:19:23 %S A199801 8,675,9800,12167,235224,465124,11309768,4931691075,5425069447, %T A199801 13051463048,8192480787000,11968683934831,15061377048200, %U A199801 28821995554247 %N A199801 Primitive elements of A060355: n such that n and n+1 are powerful but n is not of the form 4m(m+1) where m and m+1 are powerful. %C A199801 This sequence is infinite. See the comment dated Nov 19 2012 in A060355. - _Franklin T. Adams-Watters_, Nov 09 2013 %H A199801 Donovan Johnson, <a href="/A199801/b199801.txt">Table of n, a(n) for n = 1..24</a> (terms < 10^22) %e A199801 8 and 9 are powerful and although 8 = 4*1*(1+1), 1+1 is not powerful so 8 is in this sequence. %e A199801 288 and 289 are powerful but 288 = 4*8*(8+1) and both 8 and 8+1 are powerful so 288 is not in this sequence. %e A199801 675 and 676 are powerful and 675 is not of the form 4m(m+1) so 675 is in this sequence. %Y A199801 Subsequence of A060355 and hence of A001694. %K A199801 nonn %O A199801 1,1 %A A199801 _Charles R Greathouse IV_, Nov 10 2011