There were people in a party comprising of both newly married couples and old married couples,but there was a restriction in that party which states that both husband and wife of newly married couple shouldn't sit side by side but they can be seated with another couple's husband / wife . Given total number of pairs and total number of newly married couples , we need to calculate the total number of ways they can be seated side by side .Can you provide me a way to solve this .

Thanks in advance