0,2

Table of n, a(n) for n=0..72.

For n = 3 the only block missing is 000, so a(3) = 7.

Cf. A189576.

Sequence in context: A151986 A287522 A101472 * A087160 A107427 A130251

Adjacent sequences: A273869 A273870 A273871 * A273873 A273874 A273875

nonn

Jeffrey Shallit, Jun 01 2016

approved