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. 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
Jeffrey Shallit, Jan 03 2017
a(10) from Jeffrey Shallit, Apr 17 2017