OFFSET
0,3
EXAMPLE
a(2)= 4*(0+1)=4, a(3)=6*(4+0)=24, a(4)=8*(24+4)=224...
CROSSREFS
KEYWORD
nonn
AUTHOR
Gary Detlefs, Jul 18 2010
EXTENSIONS
Definition corrected by Bruno Berselli, Jul 20 2010
STATUS
approved