OFFSET
1,1
EXAMPLE
18 is a term because composite(18) = 28 = 2*2*7, 2 + 2 + 7 = 11 is prime, and 2 + 7 = 9 is composite.
30 is a term because composite(30) = 45 = 3*3*5, 3 + 3 + 5 = 11 is prime, and 3 + 5 = 8 is composite.
MAPLE
CROSSREFS
KEYWORD
nonn
AUTHOR
Juri-Stepan Gerasimov, Jan 08 2009
EXTENSIONS
Corrected (44 inserted, 120 removed, 146 removed) and extended by R. J. Mathar, May 05 2010
Name and Example section edited by Jon E. Schoenfield, Feb 11 2019
STATUS
approved