A242880 - OEIS

A242880

Numbers that are both Poulet and Proth.

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

Table of n, a(n) for n=1..28.

Giovanni Resta, Poulet n and Proth n

CROSSREFS

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

Sequence in context: A324316 A182207 A138129 * A001235 A343708 A018850