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A163862 A170907(2^n). 1
1, 4, 13, 47, 176, 678, 2658, 10521, 41860, 166995, 667100, 2666651, 10663099, 42645332 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

This sequence determines the "lim sup" of the growth of A151723.

LINKS

Table of n, a(n) for n=0..13.

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

Adjacent sequences:  A163859 A163860 A163861 * A163863 A163864 A163865

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, May 11 2010

EXTENSIONS

a(8) onwards from David Applegate, May 12 2010

STATUS

approved

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Last modified March 24 15:46 EDT 2017. Contains 283991 sequences.