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Starting numbers for which the RATS sequence has eventual period 2.
9

%I #10 Aug 15 2015 09:57:43

%S 9,18,27,36,45,54,63,69,72,78,81,87,90,96,99,108,114,117,120,126,135,

%T 144,153,156,162,171,180,189,198,207,213,216,225,234,243,252,255,261,

%U 270,279,288,297,306,312,315,324,333,342,351,354,360,369,378,387,396

%N Starting numbers for which the RATS sequence has eventual period 2.

%C A114611(a(n)) = 2. - _Reinhard Zumkeller_, Mar 14 2012

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/RATSSequence.html">RATS Sequence</a>

%Y Cf. A114611, A114612, A114613, A114614, A114615, A114616.

%Y Cf. A066711, A036839.

%K nonn,base

%O 1,1

%A _Eric W. Weisstein_, Dec 16 2005