OFFSET
0,2
EXAMPLE
For n = 4 the 16 blocks that do not occur are those containing no 0, so there are 81 - 16 = 65 of them.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Jeffrey Shallit, Jan 03 2017
EXTENSIONS
a(10) from Jeffrey Shallit, Apr 17 2017
STATUS
approved