A064025 -id:A064025 - cp's OEIS frontend

A078145 Length of period of continued fraction for square root of 1+n!.

1, 2, 4, 0, 0, 40, 0, 153, 558, 3074, 4285, 22602, 180544, 766146, 766082, 524570, 9932193, 5193268, 763601450, 4284694240, 3059999982, 48742214702, 6354126960, 1975806716944, 929707144775

Offset: 1

Labos Elemer, Nov 25 2002

			Period for sqrt(3!+1) = sqrt(7) = {1,1,1,4}, a(3) = 4.

Cf. A003285, A038507, A078146, A064025.

Table[Length[Last[ContinuedFraction[Sqrt[1+n! ]]]], {n, 1, 14}]

a(n) = A003285(A038507(n)). - Michel Marcus, Sep 25 2019

a(15)-a(20) from Vaclav Kotesovec, Aug 28 2019
a(21) from Chai Wah Wu, Sep 23 2019
a(22)-a(23) from Chai Wah Wu, Sep 25 2019
a(24)-a(25) from Chai Wah Wu, Oct 01 2019

A078146 Length of period of continued fraction for square root of -1 + n!.

Original entry on oeis.org

0, 0, 1, 4, 4, 28, 4, 12, 64, 600, 380, 10908, 23720, 168072, 5924, 1643064, 1896378, 685042, 16089346, 695623764, 722967470, 6166991370, 18958904524, 248206315456, 644968837504, 1200298458074

Offset: 1

Labos Elemer, Nov 25 2002

			Period for sqrt(4!-1) = sqrt(23) = {1,1,1,4}, a(4) = 4.

Cf. A003285, A033312, A078145, A064025.

Table[Length[Last[ContinuedFraction[Sqrt[ -1+n! ]]]], {n, 1, 14}]

a(n) = A003285(A033312(n)). - Michel Marcus, Sep 25 2019

a(15)-a(21) from Amiram Eldar, Aug 28 2019
a(22)-a(23) from Chai Wah Wu, Sep 24 2019
a(24)-a(26) from Chai Wah Wu, Sep 30 2019

cp's OEIS Frontend

A078145 Length of period of continued fraction for square root of 1+n!.

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