OFFSET
1,1
EXAMPLE
a(7) = 4 + 6 + 8 + 9 + 10 + 12 + 14 = 63.
PROG
(Magma) C:=[ k: k in [4..1000] | not IsPrime(k) ]; find:=function(n) j:=0; repeat j+:=1; s:=&+[ C[i]: i in [j..n+j-1] ]; until not IsPrime(s); return s; end function; [ find(n): n in [1..51] ]; // Klaus Brockhaus, Jun 27 2009
CROSSREFS
KEYWORD
nonn
AUTHOR
Claudio Meller, Jun 22 2009
EXTENSIONS
Values through a(51) verified by Klaus Brockhaus, Jun 27 2009
STATUS
approved