1,1

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

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

Cf. A038756, A038757.

Sequence in context: A016669 A094964 A138714 this_sequence A011230 A071209 A156227

Adjacent sequences: A038752 A038753 A038754 this_sequence A038756 A038757 A038758

nonn

Henry Bottomley (se16(AT)btinternet.com), May 03 2000