Readers -

Frank's post here:

http://www.fivedoves.com/letters/aug2012/frankm831-2.htm

is one of several involving the number 381 from a sketch.

others have mentioned the Mighty Men connection via Strong's 381h.

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I add the following which seems similar in concept.

http://www.biblewheel.com/GR/GR_Database.asp?SearchBy_VerseNumber=381

this link shows you the 381st Bible verse.

Genesis 15:20
"And the Hittites, and the Perizzites, and the Rephaims, ..."

notice the Rephaims (giants) are mentioned. also mighty men, though not righteous.