The akeidah was a traumatic event for both Avraham and Yitzchak. Immediately after they appear to go their separate ways. After Sarah's death Avraham arranges a marriage for his son, which could have been done entirely by proxy (he sends Eliezer, who comes back with Rivka, who marries Yitzchak -- but Avraham is not mentioned as being there). The next time Avraham and Yitzchak appear together in the torah text is when Yitzchak and Yishmael come to bury their father.
How much contact did Avraham and Yitzchak have after the akeidah? Were the two distant, or was Avraham an active grand-parent, or something in between? Did Avraham ever meet Yaakov and Eisav?
This question was prompted by this question about Avraham (not) seeing Eisav's sin.