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Berend Jan van der Zwaag's conjectured complete list of numbers that start different "expanding periodic loops" under the mapping described in A053392 and A060630.
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%I #17 Aug 13 2020 14:01:06

%S 3871,7777,9911,9921,9922,9931,9933,9941,9951,9955,9961,9966,9971,

%T 9977,9981,9988,9999,66642,66651,66661,66666,66678,66681,66691

%N Berend Jan van der Zwaag's conjectured complete list of numbers that start different "expanding periodic loops" under the mapping described in A053392 and A060630.

%C See link for the precise definition.

%H Lars Blomberg, <a href="/A103117/a103117.txt">All 160 members of all expanding cycles</a>

%H Erich Friedman, <a href="https://erich-friedman.github.io/mathmagic/0200.html">Problem of the Month (Feb 2000)</a>

%Y Cf. A053392, A060630.

%K base,nonn,fini,full

%O 1,1

%A _N. J. A. Sloane_, Sep 06 2008

%E 9966 inserted by _Lars Blomberg_, Aug 26 2011