1,7
Substrings may start with a 0.
The distinct substrings that occur multiple times in decimal 10 = binary 1010 are 0,1 and 10. So a(10)=3.
Cf. A141297, A141299, A141300.
Adjacent sequences: A141295 A141296 A141297 this_sequence A141299 A141300 A141301
Sequence in context: A071455 A139465 A010244 this_sequence A103960 A024936 A141059
more,nonn
Leroy Quet (qq-quet(AT)mindspring.com), Jun 24 2008
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