%I #29 Oct 02 2019 01:35:48
%S 1,2,4,0,0,40,0,153,558,3074,4285,22602,180544,766146,766082,524570,
%T 9932193,5193268,763601450,4284694240,3059999982,48742214702,
%U 6354126960,1975806716944,929707144775
%N Length of period of continued fraction for square root of 1+n!.
%F a(n) = A003285(A038507(n)). - _Michel Marcus_, Sep 25 2019
%e Period for sqrt(3!+1) = sqrt(7) = {1,1,1,4}, a(3) = 4.
%t Table[Length[Last[ContinuedFraction[Sqrt[1+n! ]]]], {n, 1, 14}]
%Y Cf. A003285, A038507, A078146, A064025.
%K nonn,hard,more
%O 1,2
%A _Labos Elemer_, Nov 25 2002
%E a(15)-a(20) from _Vaclav Kotesovec_, Aug 28 2019
%E a(21) from _Chai Wah Wu_, Sep 23 2019
%E a(22)-a(23) from _Chai Wah Wu_, Sep 25 2019
%E a(24)-a(25) from _Chai Wah Wu_, Oct 01 2019