magic sum of Whole number 1to n th

Sum of 1 to 10 = 55 sum of 11 to 20 =155 sum of 21 to 30 = 255 …………………………………………………………………

Sum of 91 to 100 = 955

Sum of 1 to 10 = 55

Sum of 1 t0 100 =5050

Sum of 1 to 1000 =500500 

Sum of 1 to 10000 =50005000

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Sum of 1 to 10000000000000000000 =500000000000000000005000000000000000000

 Sum of 1  to100 =5050

Sum of 101 to 200 =15050

Sum of 201 to 300 =25050

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Sum of 901 to 1000 =95050

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Sum of 1 to 10000000000  =5000000000500000000

Sum of 100000000001 to 20000000000  =15000000000500000000

Sum of 2000000001 to 30000000000  =25000000000500000000

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Sum of 90000000001 to 100000000000  =95000000000500000000

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tell me you abcdef and I have a maths magic

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A B C D E F
1 2 4 8 16 32
3 3 5 9 17 33
5 6 6 10 18 34
7 7 7 11 19 35
9 10 12 12 20 36
11 11 13 13 21 37
13 14 14 14 22 38
15 15 15 15 23 39
17 18 20 24 24 40
19 19 21 25 25 41
21 22 22 26 26 42
23 23 23 27 27 43
25 26 28 28 28 44
27 27 29 29 29 45
29 30 30 30 30 46
31 31 31 31 31 47
33 34 36 40 48 48
35 35 37 41 49 49
37 38 38 42 50 50
39 39 39 43 51 51
41 42 44 44 52 52
43 43 45 45 53 53
45 46 46 46 54 54
47 47 47 47 55 55
49 50 52 56 56 56
51 51 53 57 57 57
53 54 54 58 58 58
55 55 55 59 59 59
57 58 60 60 60 60
59 59 61 61 61 61
61 62 62 62 62 62
63 63 63 63 63 63
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add first number of co.

eg. 1+2+4+8=15