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A176471 Duplicate of A136404, 1

%I

%S 1,4,16,36,144,576,900,3600,14400,32400,44100,129600,176400,705600,

%T 1587600,2822400,6350400,21344400,57153600,85377600,192099600,

%U 341510400,768398400,3073593600,6915585600,12294374400,14428814400,32464832400,57715257600,129859329600

%N Duplicate of A136404,

%C Same as A136404. - _Georg Fischer_, Oct 12 2018

%C Previous name was: Highly composite square numbers for which the number of divisors increases to a record.

%t With[{sqs=Range[10000]^2},Union[Flatten[Table[Select[sqs, DivisorSigma[ 0,#]>n&,1],{n,500}]]]] (* _Harvey P. Dale_, Apr 28 2012 *)

%t t = {1}; sig = {1}; n = 1; Do[While[n++; d = DivisorSigma[0, n^2]; d <= sig[[-1]]]; AppendTo[sig, d]; AppendTo[t, n^2], {30}]; t (* _T. D. Noe_, Apr 30 2012 *)

%Y Cf. A126098 (square root of these terms).

%Y Cf. A136404. - _Georg Fischer_, Oct 12 2018

%K dead

%O 1,2

%A Ethan Ward (etkewa(AT)gmail.com), Apr 18 2010

%E Corrected and extended by _Harvey P. Dale_, Apr 28 2012

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Last modified May 13 08:08 EDT 2021. Contains 343836 sequences. (Running on oeis4.)