fHtmCoverCircleEq(ra,dec,radiusArcMin) returns a trixel table (a list) covering
the circle centered at that J2000 ra,dec, within that arc-minute radius.
A trixel table is a list of HtmStart,HtmStop pairs that describe
the HTM triangles (all points of a triangle are between its HtmStart and HtmStop.

public static IEnumerable fHtmCoverCircleEq(
	SqlDouble ra,
	SqlDouble dec,
	SqlDouble radiusArcMin
)

public:
static IEnumerable^ fHtmCoverCircleEq(
	SqlDouble ra, 
	SqlDouble dec, 
	SqlDouble radiusArcMin
)

static member fHtmCoverCircleEq : 
        ra:SqlDouble * 
        dec:SqlDouble * 
        radiusArcMin:SqlDouble -> IEnumerable 

create function fHtmCoverCircleEq(@ra float, @dec float, @radiusArcMin float) 
        returns bigint 
        as external name HTM.Sql.fHtmCoverCircleEq