1,3,7,15 ( ) ( )127 ....  规律15,31,63( ) .255 规律

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1,3,7,15 ( ) ( )127 ....  规律15,31,63( ) .255 规律

1,3,7,15 ( ) ( )127 ....  规律15,31,63( ) .255 规律
1,3,7,15 ( ) ( )127 ....  规律
15,31,63( ) .255 规律

1,3,7,15 ( ) ( )127 ....  规律15,31,63( ) .255 规律
31,63

1,3,7,15,31,63,127
1 = 2 - 1
3 = 2^2 - 1
7 = 2^3 - 1
15 = 2^4 - 1
……
127 = 2^7 - 1
3,7,15,31,63,127,255
规律和上面一样,都是2的次方减1

1,3,7,15,(31),(63),127...他们之间是2,4,8,16,32,64的关系,自己算算吧~~呵呵