[seqfan] smallest emirp to be the sum of an emirp number of composites
Jonathan Post
jvospost3 at gmail.com
Tue Dec 1 23:28:17 CET 2009
It seems to me after looking at A073620 a(1) = 0; a(n) = smallest
prime number which is a sum of n distinct composite numbers that:
179 is the smallest emirp to be the sum of an emirp number of
composites, as A073620(13) = 179, R(13)=31 is prime, R(179) = 971 is
prime.
Likewise, the next such value is 1103, as A073620(37) = 1103, R(37) =
73 is prime, R(1103) = 3011 is prime.
What are the 3rd, 4th, 5th and so forth? Using successively larger
emirp numbers of digits, or without that constraint (2 different
seqs)?
Is either a seq worth submitting?
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