OFFSET
1,1
EXAMPLE
3+13+13=29=a(11).
14+2+7=23=a(12).
15=3+5=23=a(13).
16+2+4=22=a(14).
17+17+18=52=a(15).
2+3+2=7=a(16).
19+19+20=58=a(17),
etc.
CROSSREFS
KEYWORD
nonn
AUTHOR
Juri-Stepan Gerasimov, Nov 17 2008
EXTENSIONS
a(1) and all terms from a(13) on corrected by R. J. Mathar, Apr 29 2010
STATUS
approved