One day, Sammy was organizing books in the library when a note fell out of one of the books. He picked it up and this is what it said.

Dear Jester,

Unauthorized usage: this tale is on Amazon without the author's consent. Report any sightings.

What is the next number in this sequence? Do you remember?

157, -284, 411, -665, 1046, -1771

Sincerly,

Jester

'Huh, is Jester hiding riddles in my books now?' pondered Sammy. He picked up the book, held it open, and shook it. 5 more notes fell from the book.