I'm sorry a miscalculation my part, when I'm wrong I admit it. N(4 card open ended straights or 4 card flushes) = 5128 and not 5152. Therefore in "Jacks" DDS Probability(Doubling Down) = 0.2492 and not 0.2493. The expected action per hand = 1.2492 original bets and not 1.2493. Likewise in "Queens" DDS Probability(Doubling Down) = 0.2501 and not 0.2502. The expected action per hand = 1.2501 original bets and not 1.2502.
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