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A116060 Numbers made of nontrivial runs of identical digits obtained multiplying a number m by the m-th prime. 2

%I #4 Jun 05 2024 17:32:40

%S 55,444,4411445566,1122777666688,4466224466600,44488668881177,

%T 660000556677333,9995566666633377799,11155533666655666655,

%U 441155662211122335599,1144115588776688333355,4488667700668887770033

%N Numbers made of nontrivial runs of identical digits obtained multiplying a number m by the m-th prime.

%C A run of length 1 is trivial.

%e p(4259192969)=103577289271 and

%e 4259192969*103577289271=441155662211122335599.

%t Select[Table[m*Prime[m],{m,10^6}],Min[Length/@Split[IntegerDigits[#]]]>1&] (* The program generates the first 5 terms of the sequence. *) (* _Harvey P. Dale_, Jun 05 2024 *)

%Y Cf. A033023, A116058, A116059.

%K nonn,base

%O 1,1

%A _Giovanni Resta_, Feb 13 2006

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Last modified September 9 01:17 EDT 2024. Contains 375759 sequences. (Running on oeis4.)