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A177689 Sums of 2 distinct primorials. 3
3, 7, 8, 31, 32, 36, 211, 212, 216, 240, 2311, 2312, 2316, 2340, 30031, 30032, 30036, 30060, 30240, 32340, 510511, 510512, 510516, 510540, 510720, 512820, 540540, 9699691, 9699692, 9699696, 9699720, 9699900, 9702000, 9729720, 10210200 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

This is to numbers that are the sum of 2 different primes (A038609) as primorials (A002110) are to primes (A000040). The subsequence of primes among these sums of 2 distinct primorials is the sequence of primorial primes (A018239) which is the same as the subsequence of primes among the Euclid numbers (A006862).

LINKS

Table of n, a(n) for n=1..35.

FORMULA

{a(n)} = {A002110(i) + A002110(j) for i =/= j}.

CROSSREFS

Cf. A000040, A002110, A006862, A038609.

Sequence in context: A301523 A105756 A152057 * A191611 A281678 A118622

Adjacent sequences:  A177686 A177687 A177688 * A177690 A177691 A177692

KEYWORD

easy,nonn

AUTHOR

Jonathan Vos Post, May 11 2010

STATUS

approved

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Last modified December 9 00:32 EST 2019. Contains 329871 sequences. (Running on oeis4.)