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 A188284 #6 Jan 04 2013 14:51:36 %S A188284 1,2,145,169,871,872,1454,40585,45361,45362,363601 %N A188284 Finite sequence of numbers n such that iterations for the map r -> A061602(r) starting with n ends with the same number n. %C A188284 See A173447 = the number of iterations for the map r -> A061602(r), A061602 = sum of factorials of the digits of n. %C A188284 Superset of A014080 (factorions). %e A188284 Number 169 is in sequence because 169 -> 363601 -> 1454 -> 169. %Y A188284 Cf. A188283, A014080, A173447, A061602. %K A188284 nonn,base %O A188284 1,2 %A A188284 _Jaroslav Krizek_, Mar 26 2011