OFFSET
0,2
COMMENTS
LINKS
Reinhard Zumkeller and Zak Seidov, Table of n, a(n) for n = 0..1000 (Terms 0-250 from Reinhard Zumkeller)
EXAMPLE
a(0) = 1 because 1 is the smallest positive integer that cannot be represented as sum of two semiprimes (since 4 is the smallest semiprime). a(1) = 8 because 8 is the smallest such sum of two semiprimes: 4 + 4. Similarly a(2) = 18 because 18 = 14 + 4 = 9 + 9 where {4,9,14} are semiprimes and there is no third such sum for 18.
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Jonathan Vos Post, Nov 30 2004
STATUS
approved