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A176272 Primes of the form 2(10^n-1)/3 * 10^ceiling(log_10(n+1)) + n. 1

%I #2 Mar 30 2012 17:36:45

%S 61,66666667,6666666666666666666666666666666666666666641

%N Primes of the form 2(10^n-1)/3 * 10^ceiling(log_10(n+1)) + n.

%C Equivalently, primes with decimal representation as n 6's with n's decimal representation concatenated. The next term is too large to include (2433 decimal digits).

%Y Cf. A176090 (corresponding n), A065589, A037065.

%K nonn,bref

%O 1,1

%A _Rick L. Shepherd_, Apr 13 2010

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Last modified April 25 12:33 EDT 2024. Contains 371969 sequences. (Running on oeis4.)