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A071614 a(n) is the smallest emirp such that it is the first of n consecutive emirps with equal digit sum. 2
13, 79, 15919, 197837, 3528871, 110539181, 731854429, 9819391129 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

COMMENTS

a(9) > 10^11. [From Donovan Johnson (donovan.johnson(AT)yahoo.com), Nov 07 2010]

EXAMPLE

a(3) = 15919, since 15919,15937,15973 are three consecutive emirps with digit sum 25 and this is the first occurrence of three consecutive emirps with equal digit sum.

CROSSREFS

Cf. A006567, A070905, A071612, A071613.

Sequence in context: A120782 A032652 A136373 * A045552 A189451 A133718

Adjacent sequences:  A071611 A071612 A071613 * A071615 A071616 A071617

KEYWORD

base,more,nonn

AUTHOR

Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), May 27 2002

EXTENSIONS

a(7)-a(8) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Nov 07 2010

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Last modified February 17 11:30 EST 2012. Contains 206011 sequences.