1 2 3 4 5 8 Find the last four numbers Write the reason

1 2 3 4 5 8 Find the last four numbers Write the reason

7,16,9,32
Odd number: 13579
Even digit: double in turn

A set of numbers in regular order: 2,0,4,0,6,0 Where the nth number is?
Last year's simulation in Chongwen District,
////The answer is half (1 + (- 1) to the power of N + 1) times (n + 1). I don't quite understand what makes me understand.

-When n is odd, the N + 1 power of - 1 is + 1, half (1 + (- 1) n + 1 power) multiplied by (n + 1) is (n + 1), when n is even, the N + 1 power of - 1 is - 1, half (1 + (- 1) n + 1 power) is 0, and (n + 1) multiplied by 0 is 0

Arrange 1, 2, 3, 4. Into the following array according to certain rules
1 2 5 10.
4 3 6 11.
9 8 7 12 .
16 15 14 13.
....
What is the law of it

Your lines are not in order. This topic is to draw a circle clockwise in the order of 1, as follows: first 1 24 3, then 1 25 4 3 6 9 8 7, and so on: 1 25 10 174 3 6 11 189 8 7 12 1916 15 14 13 2025 24 23

What's the third one in line 2006? 1 1 1 2 1 3 3 1 4 6 4 1 5 10 5 1
eleven

In fact, this number matrix is Yang Hui triangle, which can be regarded as the arrangement of combinatorial numbers
The number is the number of any two methods out of 2005
Yes, 2005 * 2004 / 2 = 2009010