What is the minimum number of pennies that can be placed upon a table so that each penny touches three, and only three, others?

(All the pennies must lie flat on the table.)

there must 1 and only one penny which touchs 3 others. see diagram below.
*=peeny

3*others

see?
now for some pointless java scripts
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Posted by krdmt5_000 on 2003-12-17 16:05:47