What's the ideal distance between pedals (17 cm) and the bike seat?

Question

The seat will be used constantly, and slightly recumbent.

I estimated out 65-70 cm, but perhaps some-one may have the answer.

I'm basing in on a normal to small build man (5 ft - 6ft )

Answer 1

With the rider seated and the pedals centered under the ball of the feet and the ankles in a neutral position, the knee should be bent slightly: 10-15 degrees. This distance varies according to inseam, foot size, and may even vary from shoe to shoe for the same person.

Answer 2

The ideal distance depends totally on the inseam length of the rider and the rider's flexibility.  There is no one idea distance for the "average" rider.