This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A070655 #12 Apr 05 2025 03:05:25
%S A070655 1,2,4,19380,285090,337536,448630,532390,534430,545140,547536,585106,
%T A070655 602056,677076,876180,1007386,1030200,1331950,1462000,1736346,1878790,
%U A070655 1883856,2071960,2194666,2240890,2763010,2824720,3018606,3114996
%N A070655 Numbers k such that k+1, k^2+1, k^4+1 and k^8+1 are primes.
%H A070655 Jason Bard, <a href="/A070655/b070655.txt">Table of n, a(n) for n = 1..10000</a>
%t A070655 Do[ If[ PrimeQ[n + 1] && PrimeQ[n^2 + 1] && PrimeQ[n^4 + 1] && PrimeQ[n^8 + 1], Print[n]], {n, 1, 10^7}]
%Y A070655 Cf. A070325.
%K A070655 nonn
%O A070655 1,2
%A A070655 _Robert G. Wilson v_, May 13 2002