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A067662 Numbers n such that n^2 + 1 and n^4 + 1 are primes. 1
1, 2, 4, 6, 16, 20, 24, 54, 56, 74, 90, 160, 180, 204, 210, 340, 430, 436, 466, 556, 584, 690, 760, 930, 936, 966, 986, 1144, 1150, 1246, 1406, 1434, 1586, 1644, 1700, 1824, 1850, 1870, 1910, 2074, 2126, 2224, 2260, 2266, 2336, 2360, 2536, 2604, 2646, 2676 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..50.

PROG

(MAGMA) [n: n in [0..10000]| IsPrime(n^2+1) and IsPrime(n^4+1)] // Vincenzo Librandi, Aug 07 2010

CROSSREFS

Intersection of A000068 and A005574.

Sequence in context: A259939 A069654 A000068 * A248334 A001774 A053285

Adjacent sequences:  A067659 A067660 A067661 * A067663 A067664 A067665

KEYWORD

nonn

AUTHOR

Benoit Cloitre, Feb 23 2002

STATUS

approved

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Last modified November 11 15:36 EST 2019. Contains 329016 sequences. (Running on oeis4.)