I am not positive, but would this not be...
10!/2!2!2!2!2!-(5*9!/2!2!2!2!-4*(8!/2!2!2!-3*(7!/2!2!-2*(6!/2!))))
= 68400 arrangements
blackjack
<a href="http://c.casalemedia.com/c?s=51816&f=3&id=0" target="_blank"><img src="http://as.casalemedia.com/s?s=51816&u=http://perplexus.info&f=3&id=0&if=0" width="120" height="600" border="0"></a>
flooble's webmaster puzzle
Solution (?)
