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1. , .

2. . .4.1 n-1 , n

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4.1

an

an-1

0

1

2

3

4

5

6

7

8

9

0

1,6,10,15,19

2,7,11,18,22

3,8,12,16,21

4,9,13,17,23

5,8,14,18,19

1,7,11,16,20

2,6,10,16,24

3,8,12,15,19

4,9,12,15,23

5,7,11,15,22

1

3,6,14,16,22

4,9,13,16,19

1,6,10,18,21

2,7,11,15,23

3,6,13,15,21

5,8,14,17,24

4,9,13,15,20

1,7,13,18,22

5,9,13,17,24

2,8,11,17,19

2

4,7,13,16,24

1,6,10,17,20

3,8,12,18,23

5,6,14,18,20

4,9,13,18,24

2,8,14,15,23

1,6,10,16,22

2,7,11,17,21

3,8,12,17,22

4,9,10,18,21

3

5,8,14,16,20

2,7,11,16,24

3,6,10,17,23

1,7,10,15,19

5,8,12,16,23

4,9,14,17,20

2,8,12,18,20

1,7,12,17,21

3,6,11,18,24

5,8,14,15,21

4

1,6,10,15,19

2,7,11,18,22

3,8,12,16,21

4,9,13,17,23

5,8,14,18,19

1,7,11,16,20

2,6,10,16,24

3,8,12,15,19

4,9,12,15,23

5,7,11,15,22

5

3,6,14,16,22

4,9,13,16,19

1,6,10,18,21

2,7,11,15,23

3,6,13,15,21

5,8,14,17,24

4,9,13,15,20

1,7,13,18,22

5,9,13,17,24

2,8,11,17,19

6

4,7,13,16,24

1,6,10,17,20

3,8,12,18,23

5,6,14,18,20

4,9,13,18,24

2,8,14,15,23

1,6,10,16,22

2,7,11,17,21

3,8,12,17,22

4,9,10,18,21

7

5,8,14,16,20

2,7,11,16,24

3,6,10,17,23

1,7,10,15,19

5,8,12,16,23

4,9,14,17,20

2,8,12,18,20

1,7,12,17,21

3,6,11,18,24

5,8,14,15,21

8

1,6,10,15,19

2,7,11,18,22

3,8,12,16,21

4,9,13,17,23

5,8,14,18,19

1,7,11,16,20

2,6,10,16,24

3,8,12,15,19

4,9,12,15,23

5,7,11,15,22

9

3,6,14,16,22

4,9,13,16,19

1,6,10,18,21

2,7,11,15,23

3,6,13,15,21

5,8,14,17,24

4,9,13,15,20

1,7,13,18,22

5,9,13,17,24

2,8,11,17,19