A247902 - OEIS

%I #7 Sep 29 2014 17:02:48

%S 90,18,36,18,18,54,36,90,18,72,18,18,18,36,18,54,18,90,18,18,18,18,18,

%T 36,18,36,18,18,18,36,90,36,18,18,18,72,18,54,18,18,18,18,54,36,18,18,

%U 18,18,18,54,36,36,18,36,36,18,18,54,18,54,36,18,18,18,18,18,54,18,18,72,18,54,36,36,18,36,36,18,18,18,18

%N First differences of A247683

%C All terms have digital root equal to 9.

%H Odimar Fabeny, <a href="/A247902/b247902.txt">Table of n, a(n) for n = 1..10000</a>

%Y Cf. A247683.

%K nonn,easy

%O 1,1

%A _Odimar Fabeny_, Sep 26 2014