1,7

Substrings may start with a 0.

Alois P. Heinz, Table of n, a(n) for n = 1..10000

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.

Sequence in context: A264025 A139465 A010244 * A256915 A209254 A227738

Adjacent sequences: A141295 A141296 A141297 * A141299 A141300 A141301

nonn

Leroy Quet, Jun 24 2008

Extended by Ray Chandler, Jun 25 2009

approved