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 A242880 Numbers that are both Poulet and Proth. 0
 1729, 4033, 8321, 12801, 65281, 130561, 348161, 3225601, 8355841, 8384513, 16773121, 40280065, 104988673, 2147418113, 4294901761, 4294967297, 53282340865, 68719214593, 137439477761, 1099510579201, 1911029760001, 2199021158401, 8796097216513, 281474959933441, 9007199388958721, 576460753377165313, 2305843011361177601, 18446744073709551617 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Intersection of A080075 and A001567. a(1) = 1729 is known as the Hardy-Ramanujan number (see A001235). - Omar E. Pol, Jun 14 2014 LINKS Giovanni Resta, Poulet n and Proth n CROSSREFS Cf. A080075 (Proth numbers), A001567 (Poulet numbers). Sequence in context: A324316 A182207 A138129 * A001235 A018850 A062924 Adjacent sequences:  A242877 A242878 A242879 * A242881 A242882 A242883 KEYWORD nonn AUTHOR Lear Young, May 25 2014 EXTENSIONS a(20)-a(28) from Max Alekseyev, May 28 2014 STATUS approved

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Last modified April 9 04:05 EDT 2020. Contains 333343 sequences. (Running on oeis4.)