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 A181674 Number of partitions of n into a primorial and a semiprime. 0
 0, 0, 0, 0, 1, 1, 1, 1, 0, 2, 2, 2, 0, 0, 2, 3, 1, 0, 0, 1, 1, 1, 2, 1, 0, 1, 3, 2, 0, 0, 1, 1, 0, 2, 2, 3, 1, 0, 3, 4, 2, 0, 0, 2, 2, 0, 1, 1, 0, 1, 2, 3, 1, 0, 2, 2, 2, 1, 2, 1, 1, 0, 3, 3, 1, 1, 1, 2, 1, 1, 2, 0, 0, 0, 2, 2, 0, 1, 2, 1, 1, 0, 2, 1, 1, 1, 3, 4, 1, 0, 1, 3, 2, 1, 3, 2, 2, 0, 2, 1, 1, 0, 0, 1, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,10 COMMENTS Number of ways of writing n=k+m where k primorial and m semiprime. The number of decompositions of n into an unordered sum of primorial number and semiprime number. Conjecture: Average order is Theta(log log n). -Charles R Greathouse IV, May 25, 2011 LINKS EXAMPLE a(10)=2 because 10(natural)=6(primorial)+4(semiprime)=1(primorial)+9(semiprime). CROSSREFS Cf. A001358, A002110, A100949, A175933. Sequence in context: A321300 A037864 A285635 * A181676 A262048 A034852 Adjacent sequences:  A181671 A181672 A181673 * A181675 A181676 A181677 KEYWORD nonn AUTHOR Juri-Stepan Gerasimov, Nov 04 2010 STATUS approved

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Last modified January 22 05:11 EST 2019. Contains 319353 sequences. (Running on oeis4.)