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LCM of terms in periodic part of continued fraction expansion of square root of -1+2^n.
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%I #4 Oct 15 2013 22:31:40

%S 1,2,4,6,30,14,462,30,924,62,360,126,88623545610600,254,5364840,510,

%T 214057116,1022,473045752778491241949600,2046,

%U 3968969477588889464597306400,4094,16579321550270765937400453704000

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

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

%Y Cf. A077624-A077635.

%K nonn

%O 1,2

%A _Labos Elemer_, Nov 13 2002