%0 Journal Article %A Speed, Sam E. %T The integer sequence A002620 and upper antagonistic functions %J Journal of integer sequences %D 2003 %V 6 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/JIS_2003__6_1_a0/ %G en %F JIS_2003__6_1_a0