OFFSET
0,2
COMMENTS
LINKS
FORMULA
a(n) = 6*A160121(n).
EXAMPLE
Positive terms can be written as a triangle in which row lengths is A011782 as shown below:
6;
18;
18, 54;
18, 54,54,126;
54, 54,54,126,90,126,162,306;
162, 54,54,126,90,126,162,306,198,126,162,306,306,342,414,702;
486,126,54,126,90,126,162,306,198,126,162,306,306,342,414,702,522,198,162,...
CROSSREFS
KEYWORD
nonn,tabf
AUTHOR
Omar E. Pol, Jan 13 2015
STATUS
approved