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 A264735 #22 Nov 16 2024 18:48:50
%S A264735 2,13,71,263,827,2377,6379,16603,41611,101573,243473,573637,1333613,
%T A264735 3065983,6975971,15746347,35277211,78510373,173717329,382404863,
%U A264735 837870343,1828047503,3973066781,8604768101,18576139177,39983413319
%N A264735 a(n) = prime(2^(n-1)*(2*n-1)), n >= 1.
%F A264735 a(n) = A000040(2^(n-1)*(2*n-1)).
%F A264735 a(n) = A000040(A014480(n-1)). - _Michel Marcus_, Nov 23 2015
%t A264735 Table[Prime[2^(n - 1)*(2*n - 1)], {n, 26}]
%o A264735 (Magma) [NthPrime(2^(n-1)*(2*n-1)): n in [1..20]]; // _Vincenzo Librandi_, Nov 23 2015
%o A264735 (PARI) a(n)=if(n<1,print1("Error n < 1"),prime(2^(n-1)*(2*n-1))) \\ _Anders Hellström_, Nov 23 2015
%o A264735 (Perl) use ntheory ":all"; say "$_ ",nth_prime(2**($_-1) * (2*$_-1)) for 1..50; # _Dana Jacobsen_, Apr 28 2017
%Y A264735 Cf. A000040, A014480, A264731 (main diagonal).
%K A264735 nonn
%O A264735 1,1
%A A264735 _L. Edson Jeffery_, Nov 22 2015