A077632 LCM of terms in periodic part of continued fraction expansion of square root of 1+2^n.

2, 4, 3, 8, 10, 16, 66, 32, 220, 64, 235620, 128, 360360, 256, 2508660, 512, 16290726273360, 1024, 23508390120198798054240, 2048, 465977246353354335600, 4096, 3026207803243202829468977760, 8192

Offset

1,1

Links

Table of n, a(n) for n=1..24.

Mathematica

Table[Apply[LCM, Last[ContinuedFraction[Sqrt[1+2^u]]]], {u, 1, 25}]

Crossrefs

Cf. A077624-A077635.

Sequence in context: A186003 A377835 A368221 * A347976 A253722 A361640

Adjacent sequences: A077629 A077630 A077631 * A077633 A077634 A077635

Keyword

nonn

Author

Labos Elemer, Nov 13 2002

Status

approved