A053608 Numbers x=LCM(1,2,...,n) such that x^2 + 1 is prime.

1, 2, 6, 420, 360360, 718766754945489455304472257065075294400

Offset

1,2

Links

Table of n, a(n) for n=1..6.

Crossrefs

A003418, A051451, A049536, A046029, A051739, A053609.

Sequence in context: A092024 A252741 A069261 * A199239 A123261 A124061

Adjacent sequences: A053605 A053606 A053607 * A053609 A053610 A053611

Keyword

nonn

Author

Labos Elemer, Feb 09 2000

Status

approved