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 A276569 #6 Sep 12 2016 17:02:35 %S A276569 19,31,49,59,73,79,85,101,103,109,113,133,137,139,145,151,163,167,169, %T A276569 191,197,199,203,205,229,241,251,253,259,263,269,271,281,289,293,295, %U A276569 299,311,317,319,323,343,347,349,355,367,371,373,379,385,391,401,403,409,413,439,443,449,451,457,461,469,473,479,487,491,499 %N A276569 Numbers such that ludic factor of n (A272565) does not divide n. %H A276569 Antti Karttunen, <a href="/A276569/b276569.txt">Table of n, a(n) for n = 1..3200</a> %o A276569 (Scheme, with _Antti Karttunen_'s IntSeq-library) %o A276569 (define A276569 (NONZERO-POS 1 1 (lambda (n) (modulo n (A272565 n))))) %Y A276569 Complement: A276568. %Y A276569 Cf. A272565, A276440. %Y A276569 Subsequence of A276437. %Y A276569 Cf. A192505 (a subsequence). %K A276569 nonn %O A276569 1,1 %A A276569 _Antti Karttunen_, Sep 11 2016