The second row of my table shows that for the same rules I get 1.295 and 0.478 respectively, which is close enough for me.
3c: Exceptions to single-deck H17 basic strategy.3b: Exceptions to double-deck S17 basic strategy.3a: Exceptions to single-deck S17 basic strategy.2b: Probabilities of dealer blackjack before peek.2a: Probabilities of dealer blackjack after peek.1: Total dependent expected return table for an infinite deck.