Definition: 123456789 is a sequence of digits, 1-9, which could also be read as any number from 0 to 9, except for 1. Q means "What's next?" A stands for "a" or "ay" (like "apple"). Here, the sequence starts with 123456789 and goes through 1-9, alternating between 1s and 2s, so it's not just a number.
closed bracket.
what should be said.