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 A178486 #9 Feb 13 2013 20:26:20 %S A178486 13717,13718,13727,13729,13738,13739,13817,13818,13837,13840,13848, %T A178486 13850,13927,13929,13937,13940,13959,13960,14038,14039,14048,14050, %U A178486 14059,14060,14717,14718,14727,14729,14738,14739,14917,14918,14947,14951,14958,14961 %N A178486 (A178476(n)-3)/9. %C A178486 The sequence is motivated by the fact that numbers whose decimal expansion is a permutation of 123456, are all of the form 9k+3. %C A178486 There are 6!=720 terms in this finite sequence. %H A178486 Nathaniel Johnston, <a href="/A178486/b178486.txt">Table of n, a(n) for n = 1..720</a> (full sequence) %F A178486 a(n) + a(6!+1-n) = 86419. %F A178486 a(n) == 0, 1, 2, 7, 8 or 9 (mod 10). %o A178486 (PARI) forstep( m=123456,654321/*or less*/,9, is_A178476(m) & print1(m\9",")) /*cf. A178476*/ %Y A178486 Cf. A030298, A030299, A055089, A060117, A178485, A191819, A191820. %K A178486 fini,full,nonn,base,easy %O A178486 1,1 %A A178486 _M. F. Hasler_, May 28 2010