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A104389 Repdigits which are the average of two successive primes. 3

%I

%S 4,6,9,99,111,4444,111111111,555555555555,9999999999999999,

%T 111111111111111111,444444444444444444,555555555555555555555,

%U 777777777777777777777777,333333333333333333333333333333333

%N Repdigits which are the average of two successive primes.

%F a(n)=(A104387(n)+A104388(n))/2

%Y Corresponding primes: A104387, A104388.

%Y Cf. A054268, A104386, A104387, A104388.

%K nonn,base

%O 1,1

%A _Zak Seidov_, Mar 04 2005

%E More terms from _Giovanni Resta_, Apr 05 2006

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Last modified August 14 09:14 EDT 2020. Contains 336480 sequences. (Running on oeis4.)