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A038755 Earliest sequence where a(a(n))=2^n. 2
3, 8, 2, 256, 6, 32, 9, 4, 128, 11, 1024, 13, 4096, 15, 16384 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..15.

Index entries for sequences of the a(a(n)) = 2n family

EXAMPLE

a(9)=a(a(7))=2^7=128, a(16)=a(2^4)=a(a(a(4)))=a(a(256))=2^256>10^77

CROSSREFS

Cf. A038756, A038757.

Sequence in context: A094964 A197144 A138714 * A245171 A011230 A245168

Adjacent sequences:  A038752 A038753 A038754 * A038756 A038757 A038758

KEYWORD

nonn

AUTHOR

Henry Bottomley, May 03 2000

STATUS

approved

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Last modified August 20 19:51 EDT 2019. Contains 326155 sequences. (Running on oeis4.)