cp's OEIS Frontend

A214557 Subsequence of fixed points A099009 of the Kaprekar mapping with numbers of the form 8(x1+1)//6(x1+1)//4(x1+1)//3(x2)//2(x1)//1//9(x1+1)//7(x1+1)//6(x2)//5(x1+1)//3(x1+1)//1(x1)//2.

%I A214557 #21 Jul 17 2025 19:03:02
%S A214557 864197532,86431976532,8643319766532,864333197666532,
%T A214557 86433331976666532,886644219977553312,8643333319766666532,
%U A214557 88664432199776553312,864333333197666666532,8866443321997766553312,86433333331976666666532,886644333219977666553312
%N A214557 Subsequence of fixed points A099009 of the Kaprekar mapping with numbers of the form 8(x1+1)//6(x1+1)//4(x1+1)//3(x2)//2(x1)//1//9(x1+1)//7(x1+1)//6(x2)//5(x1+1)//3(x1+1)//1(x1)//2.
%C A214557 The sign // denotes concatenation of digits in the definition, and d(x) denotes x repetitions of d, x>=0.
%H A214557 Syed Iddi Hasan, <a href="/A214557/b214557.txt">Table of n, a(n) for n = 0..599</a>
%F A214557 If d(x) denotes x repetitions of the digit d, then a(n)=8(x1+1)6(x1+1)4(x1+1)3(x2)2(x1)19(x1+1)7(x1+1)6(x2)5(x1+1)3(x1+1)1(x1)2, where x1,x2>=0.
%e A214557 86431976532 is a fixed point of the mapping for x1=0, x2=1.
%Y A214557 Cf. A099009, A214555, A214556, A214558, A214559.
%K A214557 nonn,base
%O A214557 0,1
%A A214557 _Syed Iddi Hasan_, Jul 20 2012
%E A214557 Terms a(5) and beyond from b-file by _Andrew Howroyd_, Feb 05 2018