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A176272 Primes of the form 2(10^n-1)/3 * 10^ceiling(log_10(n+1)) + n. 1
61, 66666667, 6666666666666666666666666666666666666666641 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

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).

LINKS

Table of n, a(n) for n=1..3.

CROSSREFS

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

Sequence in context: A068533 A093631 A087513 * A173418 A147667 A022084

Adjacent sequences:  A176269 A176270 A176271 * A176273 A176274 A176275

KEYWORD

nonn,bref

AUTHOR

Rick L. Shepherd, Apr 13 2010

STATUS

approved

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Last modified November 17 01:05 EST 2019. Contains 329209 sequences. (Running on oeis4.)