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A038756 Earliest sequence where a(a(n))=3^n. 2
2, 3, 9, 5, 81, 7, 729, 10, 27, 6561, 12, 177147, 14, 1594323, 16, 14348907, 18, 129140163, 20, 1162261467, 22, 10460353203, 24, 94143178827, 26, 847288609443, 19683, 29, 22876792454961, 31, 205891132094649, 33, 1853020188851841, 35 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..34.

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

EXAMPLE

a(7)=a(a(6))=3^6=729

CROSSREFS

Cf. A038755, A038757.

Sequence in context: A253046 A109607 A127612 * A011164 A082234 A263256

Adjacent sequences:  A038753 A038754 A038755 * A038757 A038758 A038759

KEYWORD

nonn

AUTHOR

Henry Bottomley, May 03 2000

STATUS

approved

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Last modified December 4 11:13 EST 2016. Contains 278750 sequences.