OFFSET
0,2
EXAMPLE
If written as a triangle,
1,
2,
1,5,
1,5,5,11,
1,5,5,11,7,15,19,23,
1,5,5,11,7,15,19,23,7,15,21,29,29,49,59,47,
1,5,5,11,7,15,19,23,7,15,21,29,29,49,59,...
the rows approach A151728.
CROSSREFS
KEYWORD
nonn,tabf
AUTHOR
N. J. A. Sloane, Jun 15 2009, Jun 16 2009
STATUS
approved