in plain sight.
Take a moment before reading on. Start at the top left of the grid and follow each row from left to right. Don’t try to solve it all at once. Instead, check how each number connects to the next. When you reach the fourth row, pay close attention: that is where the sequence changes.
The missing number is 46.
The fourth row moves from 45 directly to 47. Since 46 belongs between them, it is the number omitted from the grid. The rest of the sequence continues