A077635 - OEIS

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A077635

LCM of terms in periodic part of continued fraction expansion of square root of -1+3^n.

12

2, 4, 10, 16, 210, 52, 10764, 160, 840, 484, 78225840, 1456, 5729631692400, 4372, 932723933480442148565520, 13120, 202096081896183783466278120, 39364, 1505075187143521116689096930825555405884185492185368021027531191578186233461600

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Chai Wah Wu, Table of n, a(n) for n = 1..30

MATHEMATICA

Table[Apply[LCM, Last[ContinuedFraction[Sqrt[ -1+3^u]]]], {u, 1, 25}]

CROSSREFS

Cf. A077624-A077635.

Sequence in context: A277918 A238720 A264585 * A125754 A097870 A244474

Adjacent sequences: A077632 A077633 A077634 * A077636 A077637 A077638

KEYWORD

nonn

AUTHOR

Labos Elemer, Nov 13 2002

STATUS

approved