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 A264735 a(n) = prime(2^(n-1)*(2*n-1)), n >= 1. 1
 2, 13, 71, 263, 827, 2377, 6379, 16603, 41611, 101573, 243473, 573637, 1333613, 3065983, 6975971, 15746347, 35277211, 78510373, 173717329, 382404863, 837870343, 1828047503, 3973066781, 8604768101, 18576139177, 39983413319 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS FORMULA a(n) = A000040(2^(n-1)*(2*n-1)). a(n) = A000040(A014480(n-1)). - Michel Marcus, Nov 23 2015 MATHEMATICA Table[Prime[2^(n - 1)*(2*n - 1)], {n, 26}] PROG (MAGMA) [NthPrime(2^(n-1)*(2*n-1)): n in [1..20]]; // Vincenzo Librandi, Nov 23 2015 (PARI) a(n)=if(n<1, print1("Error n < 1"), prime(2^(n-1)*(2*n-1)) \\ Anders Hellström, Nov 23 2015 (Perl) use ntheory ":all"; say "\$_ ", nth_prime(2**(\$_-1) * (2*\$_-1))  for 1..50; # Dana Jacobsen, Apr 28 2017 CROSSREFS Cf. A000040, A014480, A264731 (main diagonal). Sequence in context: A301944 A128743 A218184 * A289926 A188676 A097349 Adjacent sequences:  A264732 A264733 A264734 * A264736 A264737 A264738 KEYWORD nonn AUTHOR L. Edson Jeffery, Nov 22 2015 STATUS approved

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Last modified May 21 00:51 EDT 2019. Contains 323428 sequences. (Running on oeis4.)