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A069148 Numbers n such that n*n!/A062758(n) is not an integer where A062758(n) is the product of squares of divisors of n. 1

%I

%S 4,6,8,10,14,16,18,20,22,26,28,34,38,42,44,46,52,58,62,66,68,74,76,78,

%T 82,86,92,94,102,106,114,116,118,122,124,134,138,142,146,148,158,164,

%U 166,172,174,178,186,188,194,202,206,212,214,218,222,226,236,244,246

%N Numbers n such that n*n!/A062758(n) is not an integer where A062758(n) is the product of squares of divisors of n.

%t Rest[Position[Table[(n*n!)/(Times@@Divisors[n])^2,{n,250}],_?(!IntegerQ[ #]&)]//Flatten] (* _Harvey P. Dale_, Apr 24 2019 *)

%o (PARI) for(n=1,320,if((n*(n!))%(n^numdiv(n))>0,print1(n,",")))

%Y Complement of A069149.

%Y Cf. A001563 (n*n!), A062758.

%K easy,nonn

%O 1,1

%A _Benoit Cloitre_, Apr 08 2002

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Last modified January 28 06:29 EST 2020. Contains 331317 sequences. (Running on oeis4.)