OFFSET
1,1
EXAMPLE
(0+1)*2=2=a(1).
(3+2)*2=10=a(2).
(5+2)*3=21=a(3).
(7+2)*3 =27=a(4).
(3+2)*2=10=a(5).
(5+11)*2=32=a(6).
(2+3)*13 =65=a(7).
(2+7)*3=27=a(8), etc.
CROSSREFS
KEYWORD
nonn,less
AUTHOR
Juri-Stepan Gerasimov, Oct 31 2008
EXTENSIONS
Replaced an 18 by a 14. R. J. Mathar, Feb 21 2009
STATUS
approved