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 A059801 #29 Aug 22 2022 10:08:50 %S A059801 2,3,7,17,59,283,311,383,499,521,541,599,1193,1993,2671,7547,24019, %T A059801 46301,48121,68597,91283,131497,148663,184463,341233 %N A059801 Numbers k such that 4^k - 3^k is prime. %C A059801 Some of the larger entries may only correspond to probable primes. %C A059801 The values corresponding to 1193 (719 digits) and 1993 (1200 digits) have been certified prime with Primo. - _Rick L. Shepherd_, Sep 10 2002 %C A059801 8 more terms found by Jean-Louis Charton during 2004 - 2006. Corresponding numbers of decimal digits are 14461, 27876, 28972, 41300, 54958, 79170, 89505, 111058, 205443. - _Alexander Adamchuk_, Dec 02 2006 %H A059801 Bogley, William A.; Williams, <a href="https://doi.org/10.1007/s00209-016-1664-3">Gerald Efficient finite groups arising in the study of relative asphericity</a>. Math. Z. 284, No. 1-2, 507-535 (2016). %t A059801 Select[Range[1000], PrimeQ[4^# - 3^#] &] (* _Alonso del Arte_, Nov 03 2011 *) %o A059801 (PARI) select(vector(10^5,i,i),n->ispseudoprime(4^n-3^n)) \\ _Charles R Greathouse IV_, Feb 11 2011 %Y A059801 Cf. A000043, A057468, A059802, etc., A129736, A129737. %K A059801 nonn,nice,hard %O A059801 1,1 %A A059801 _Mike Oakes_, Feb 23 2001