2^0 - > ( 1 ) - > 1 2^1 - > ( 2 ) - > 1 2^2 - > ( 4 ) - > 1 2^3 - > ( 8 ) - > 0 2^4 - > ( 16 ) - > 1 2^5 - > ( 32 ) - > 0 2^6 - > ( 64 ) - > 1 2^7 - > ( 128 ) - > 0 manchek looked at the number he had just written , and inserted the dashes : 1-110-1010 .