id:A038757 - OEIS Search Results

Search: id:A038757

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Earliest sequence where a(a(n))=4^n.

+0
3

2, 4, 5, 16, 64, 7, 4096, 9, 65536, 11, 1048576, 13, 16777216, 15, 268435456, 256, 18, 17179869184, 20, 274877906944, 22, 4398046511104, 24, 70368744177664, 26, 1125899906842624, 28, 18014398509481984, 30, 288230376151711744, 32 (list; graph; listen)

	OFFSET	`1,1`
	LINKS	`Index entries for sequences of the a(a(n)) = 2n family`
	EXAMPLE	`a(7)=a(a(6))=4^6=4096`
	CROSSREFS	`Cf. A038755, A038756.` `Sequence in context: A056401 A056406 A070917 this_sequence A062549 A092051 A065063` `Adjacent sequences: A038754 A038755 A038756 this_sequence A038758 A038759 A038760`
	KEYWORD	`nonn`
	AUTHOR	`Henry Bottomley (se16(AT)btinternet.com), May 03 2000`

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Last modified November 23 17:09 EST 2009. Contains 167438 sequences.

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