Your father is probably very guilty about how things played out and feels an immense amount of regret. This weak sauce attempt to reach out to you is nothing more than him trying to relieve the guilt he feels.

An evil heartless man in your position would ignore or strongly reject this offer and go on living normally secretly wishing that it would inflict at least some pain. I personally suggest actually accepting his request. I wouldn't get too emotionally attached since this jerk off has already abandoned you once. But at least give him a chance to become involved and do the right thing.

Best case scenario, you gain a good friend (you can never have enough). Worst case, he meets you, ask to borrow money, then never shows up again. If this happens you can laugh in his face and tell him to F*** off.