Adjust a view so there is one image of size normal and other images are thumbnails
Check out the View Nodes Split module.

This module allows site administrators or builders to have a different view mode for the first nodes of a view result.
If you ever had (or currently have) this scenario: you have a view of nodes but you want that the first node (or first X nodes) to have a different view mode, then this module is for you. The module can split the results from a view into 2 lists. It actually does not make 2 separate lists, it just uses a a different view mode to render the first X nodes from a view.

You can also use a view attachment to display a node and attach more nodes to it. Make sure you offset your attached view by 1.