Find out the law of the following formula, and fill in the formula completely. 19 + 9x9 = 100

199+99*99＝10000
1999+999*999＝1000000

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1. The following data 1, 4, 7, 10, 13, 16, 19 ···············································································,
2. What is the 100th number of the following data 1, 4, 7, 10, 13, 16, 19 How much is the 100th number? What I want is the law. There are letters to express what the law is. Otherwise, how did the number come from? Thank you first
3. There is a string of numbers 1, 7, 13, 19, 25 The 1000th number in this column is______ ．
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5. 1 7 13 19 25 what is the 1000th number in this series of numbers
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7. 1 7 13 19 25…… What's the number 1000 On Mathematics
8. There is a column number: 1, 2, 5, 13 Starting from the second, three times of each number is exactly equal to the sum of the two numbers on its left and right sides, and find whether the number 2009 is odd or even
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12. The formula arranged according to certain rules: 3 + 1,4 + 7,5 + 13,6 + 19 +. Then, what is the 100th formula?
13. From the beginning, add 4 and 5 in turn to get the following column of numbers 1, 5, 10, 14, 19, 23 and 28. The number closest to 2009 in this column is ()
14. 5,11,19,29 the next number according to the law
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16. Observe the following two columns: 5, 9, 13, 17, 21, 25, 29, 33 4,7,10,13,16,19,22,25…… Which is the 15th pair of the same number among them
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20. There are nine numbers in a row. Their average is 32. The average of the first five numbers is 28. The average of the last five numbers is 33?