A109464 - OEIS

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A109464

Numbers n such that A112131(n) and A112131(n+1) are both Harshad numbers.

%I #3 Dec 15 2017 17:36:53

%S 9,103207,106039,150200,172003,303714,370649,544019,952640,1000129,

%T 1089247,1104024,1124514,1243264,1668275,2030120,2060910,2304925,

%U 2330000

%N Numbers n such that A112131(n) and A112131(n+1) are both Harshad numbers.

%C Conjecture: Sequence is infinite.

%e a(1)=9 because 910/10 = 91 and 101112/6 = 16852.

%Y Cf. A109448.

%K base,more,nonn

%O 1,1

%A _Jason Earls_, Aug 28 2005