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A070655 Numbers n such that n+1, n^2+1, n^4+1 and n^8+1 are primes. 0
1, 2, 4, 19380, 285090, 337536, 448630, 532390, 534430, 545140, 547536, 585106, 602056, 677076, 876180, 1007386, 1030200, 1331950, 1462000, 1736346, 1878790, 1883856, 2071960, 2194666, 2240890, 2763010, 2824720, 3018606, 3114996 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..29.

MATHEMATICA

Do[ If[ PrimeQ[n + 1] && PrimeQ[n^2 + 1] && PrimeQ[n^4 + 1] && PrimeQ[n^8 + 1], Print[n]], {n, 1, 10^7}]

CROSSREFS

Cf. A070325.

Sequence in context: A134718 A328313 A048829 * A006263 A266198 A274990

Adjacent sequences:  A070652 A070653 A070654 * A070656 A070657 A070658

KEYWORD

nonn

AUTHOR

Robert G. Wilson v, May 13 2002

STATUS

approved

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Last modified August 9 20:09 EDT 2020. Contains 336326 sequences. (Running on oeis4.)