OFFSET
1,2
COMMENTS
LINKS
Paul Tek, Table of n, a(n) for n = 1..3323
Paul Tek, PERL program for this sequence
FORMULA
EXAMPLE
01 -> 010 -> 01001 -> 010010100 -> 01001010001001010 etc.
So the number of 0's in the n-th stage is the sequence 1, 2, 3, 6, 11 etc.
MATHEMATICA
t = Nest[ Most@ Flatten@ {#, #} &, {0, 1}, 25]; Table[ Count[ Take[t, 2^n + 1], 0], {n, 0, 25}] (* Robert G. Wilson v, Aug 17 2009 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Jack W Grahl, Aug 14 2009
EXTENSIONS
a(23)-a(26) from Robert G. Wilson v, Aug 17 2009
STATUS
approved