0,2

Table of n, a(n) for n=0..11.

For n = 4 the 16 blocks that do not occur are those containing no 0, so there are 81 - 16 = 65 of them.

Cf. A008683.

Cf. A280468, which gives the length of the shortest prefix containing all the length-n blocks.

Sequence in context: A260938 A274626 A161712 * A137368 A191007 A036215

Adjacent sequences: A280463 A280464 A280465 * A280467 A280468 A280469

nonn,more

Jeffrey Shallit, Jan 03 2017

a(10) from Jeffrey Shallit, Apr 17 2017

approved