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A077633 LCM of terms in periodic part of continued fraction expansion of square root of -1+2^n. 0
1, 2, 4, 6, 30, 14, 462, 30, 924, 62, 360, 126, 88623545610600, 254, 5364840, 510, 214057116, 1022, 473045752778491241949600, 2046, 3968969477588889464597306400, 4094, 16579321550270765937400453704000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..23.

MATHEMATICA

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

CROSSREFS

Cf. A077624-A077635.

Sequence in context: A195333 A106274 A204661 * A006933 A046847 A121069

Adjacent sequences:  A077630 A077631 A077632 * A077634 A077635 A077636

KEYWORD

nonn

AUTHOR

Labos E. (labos(AT)ana.sote.hu), Nov 13 2002

STATUS

approved

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Last modified May 23 05:24 EDT 2013. Contains 225585 sequences.