我是真相侠：
+11: 2个+10
+12: 2个+11 = 2 * 2 = 4个+10
+13: 2个+12 = 2 * 4 = 8个+10
+14: 2个+13 = 2 * 8 = 16个+10
+15: 2个+14 = 2 * 16 = 32个+10
+16: 2个+15 = 2 * 32 = 64个+10
+17: 2个+16 = 2 * 64 = 128个+10
+18: 2个+17 = 2 * 128 = 256个+10
+19: 2个+18 = 2 * 256 = 512个+10
+20: 2个+19 = 2 * 512 = 1024个+10
+21: 2个+20 = 2 * 1024 = 2048个+10
+22: 2个+21 = 2 * 2048 = 4096个+10
+23: 2个+22 = 2 * 4096 = 8192个+10
+24: 2个+23 = 2 * 8192 = 16384个+10
+25: 2个+24 = 2 * 16384 = 32768个+10
+26: 2个+25 = 2 * 32768 = 65536个+10
+27: 2个+26 = 2 * 65536 = 131072个+10
+28: 2个+27 = 2 * 131072 = 262144个+10
+29: 2个+28 = 2 * 262144 = 524288个+10
+30: 2个+29 = 2 * 524288 = 1048576个+10