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2^p + 3 where p is prime.
6

%I #12 Sep 08 2022 08:46:07

%S 7,11,35,131,2051,8195,131075,524291,8388611,536870915,2147483651,

%T 137438953475,2199023255555,8796093022211,140737488355331,

%U 9007199254740995,576460752303423491,2305843009213693955,147573952589676412931,2361183241434822606851

%N 2^p + 3 where p is prime.

%H Vincenzo Librandi, <a href="/A241573/b241573.txt">Table of n, a(n) for n = 1..200</a>

%t Table[2^Prime[n] + 3, {n, 20}]

%o (Magma) [2^p+3: p in PrimesUpTo(100)];

%o (Sage) [2^p+3 for p in primes(100)] # _Bruno Berselli_, Apr 29 2014

%Y Cf. sequences of the form 2^p+k with p prime: A034785 (k=0), A001348 (k=-1), A098640 (k=1), A241676 (k=-3), this sequence (k=3), A241678 (k=-5), A241677 (k=5), A098815 (k=-7), A241679 (k=7), A098231 (k=-11), A241680 (k=11).

%K nonn

%O 1,1

%A _Vincenzo Librandi_, Apr 29 2014