A pattern or a sequence is a set of numbers that are connected in some way. All sequences have a rule. For example, sometimes the numbers might count on by 5 each time, other times they might be ...

Imagine cruising down the open road, the hum of the engine beneath you, the wind in your hair, and the American landscape ...

Two, 4, 6, 8 … What comes next? Once you recognize this as a sequence of even numbers, counted by twos, then you know that the numbers 10 and 12 come next. Two, 3, 5, 7, 11 … What comes next? This ...

These are questions that Neil Sloane, a mathematician of Highland Park, New Jersey, loves to ask. Sloane is the founder of the On-Line Encyclopedia of Integer Sequences, a database of 362,765 (and ...