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A216417 Numbers of the form p^2*q^3 where p, q are (not necessarily distinct) primes. 0

%I #25 Jan 17 2014 14:09:40

%S 32,72,108,200,243,392,500,675,968,1125,1323,1352,1372,2312,2888,3087,

%T 3125,3267,4232,4563,5324,6125,6728,7688,7803,8575,8788,9747,10952,

%U 11979,13448,14283,14792,15125,16807,17672,19652,19773,21125,22472,22707,25947,27436,27848,29768

%N Numbers of the form p^2*q^3 where p, q are (not necessarily distinct) primes.

%t With[{nn=50},Take[Union[First[#]^2 Last[#]^3&/@ Tuples[ Prime[ Range[ nn]],2]], nn]] (* _Harvey P. Dale_, Jan 17 2014 *)

%Y Union of A143610 (where p != q) and A050997 (where p = q).

%K nonn

%O 1,1

%A _V. Raman_, Sep 07 2012

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Last modified April 18 08:27 EDT 2024. Contains 371769 sequences. (Running on oeis4.)