A070655 Numbers n such that n+1, n^2+1, n^4+1 and n^8+1 are primes.

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

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