OFFSET
0,1
COMMENTS
The sequence of successive differences is given by the following distinct composite numbers 9,6,12,8,4,18,14,10,20,.... And trivially second term onwards only even composite numbers occur. Conjecture: Let a(m+1)-a(m) be composite (k). Then there exists a constant C such that m < C*k.
FORMULA
a(n) = n-th partial sum of A068632. - David Wasserman, May 24 2005
CROSSREFS
KEYWORD
nonn
AUTHOR
Amarnath Murthy, Sep 09 2003
EXTENSIONS
More terms from David Wasserman, May 24 2005
STATUS
approved