OFFSET
1,2
EXAMPLE
13*(13+14)=351=a(12).
2*(7+15)=44=a(13).
3*(5+16)=63=a(14).
2*(4+17)=42=a(15).
17*(18+2)=340=a(16).
3*(2+19)=63=a(17).
19*(20+2)=418=a(18).
2*(5+21)=210=a(19),
etc.
CROSSREFS
KEYWORD
nonn
AUTHOR
Juri-Stepan Gerasimov, Dec 01 2008
EXTENSIONS
Corrected (210 replaced by 52, 506 by 68, 72 by 76 etc.) by R. J. Mathar, May 01 2010
STATUS
approved