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A163862
a(n) = A170907(2^n).
1
1, 4, 13, 47, 176, 678, 2658, 10521, 41860, 166995, 667100, 2666651, 10663099, 42645332
OFFSET
0,2
COMMENTS
This sequence determines the "lim sup" of the growth of A151723.
FORMULA
It appears that a(n)/4^n converges to a constant c which is roughly 0.635.
CROSSREFS
Sequence in context: A017944 A017945 A055451 * A149440 A149441 A149442
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, May 11 2010
EXTENSIONS
a(8) onwards from David Applegate, May 12 2010
STATUS
approved