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 A171439 #2 Mar 30 2012 17:23:31 %S A171439 393625,1106861,2480233,3166919,5919509,6099895,6440375,6600349, %T A171439 8660407,11407151,12780523,14753065,16900639,18821573,21707441, %U A171439 22671125,23080813,23165125,24924335,27200929,28514195,29947673,30452005 %N A171439 Doubly Orderly Numbers: composite numbers that are orderly for two values of k. %C A171439 See A167408 for the definition of Orderly. %C A171439 All doubly orderly numbers are orderly modulo k=tau(n)+1 and k=tau(n)+3, and are also "very orderly" (Cf. A167409). %C A171439 Composite numbers appearing in both A167409 and A168003. %C A171439 No composite number is orderly for more than two values of k, and 11 is the only prime which is orderly for exactly two values of k. 11 does not appear in this sequence as the definition of "doubly orderly" applies only to composite numbers. %e A171439 393625 is in the list because it is orderly modulo 17 and 19 %e A171439 .{1,1175,15745,3149,5,125,393625,25,1675,5875,8375,335,47,235,78725,67} == {1,2,3,...,16} mod 17 %e A171439 .{1,393625,1675,5875,5,25,235,78725,47,67,125,335,15745,3149,8375,1175} == {1,2,3,...,16} mod 19 %Y A171439 Cf. A167408 - Orderly Numbers %Y A171439 Cf. A167409 - Very Orderly Numbers %Y A171439 Cf. A168003 - Numbers which are orderly modulo tau(n)+3 %K A171439 nonn %O A171439 1,1 %A A171439 _Andrew Weimholt_, Dec 09 2009