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A104389 Repdigits which are the average of two successive primes. 3
4, 6, 9, 99, 111, 4444, 111111111, 555555555555, 9999999999999999, 111111111111111111, 444444444444444444, 555555555555555555555, 777777777777777777777777, 333333333333333333333333333333333 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..14.

FORMULA

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

CROSSREFS

Corresponding primes: A104387, A104388.

Cf. A054268, A104386, A104387, A104388.

Sequence in context: A317248 A115666 A245044 * A115655 A084350 A028279

Adjacent sequences:  A104386 A104387 A104388 * A104390 A104391 A104392

KEYWORD

nonn,base

AUTHOR

Zak Seidov, Mar 04 2005

EXTENSIONS

More terms from Giovanni Resta, Apr 05 2006

STATUS

approved

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Last modified July 11 07:37 EDT 2020. Contains 335616 sequences. (Running on oeis4.)