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A242880 Numbers that are both Poulet and Proth. 0


%S 1729,4033,8321,12801,65281,130561,348161,3225601,8355841,8384513,

%T 16773121,40280065,104988673,2147418113,4294901761,4294967297,

%U 53282340865,68719214593,137439477761,1099510579201,1911029760001,2199021158401,8796097216513,281474959933441,9007199388958721,576460753377165313,2305843011361177601,18446744073709551617

%N Numbers that are both Poulet and Proth.

%C Intersection of A080075 and A001567.

%C a(1) = 1729 is known as the Hardy-Ramanujan number (see A001235). - _Omar E. Pol_, Jun 14 2014

%H Giovanni Resta, <a href="http://www.numbersaplenty.com/both_Poulet_and_Proth.html"> Poulet n and Proth n</a>

%Y Cf. A080075 (Proth numbers), A001567 (Poulet numbers).

%K nonn

%O 1,1

%A _Lear Young_, May 25 2014

%E a(20)-a(28) from _Max Alekseyev_, May 28 2014

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Last modified May 28 13:20 EDT 2020. Contains 334683 sequences. (Running on oeis4.)