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 A282400 #35 Feb 27 2025 18:10:33
%S A282400 3,17,73,257,924844033,966367641601,9354438770689,
%T A282400 468230246058455728129,12676506002282294014967032053760001,
%U A282400 112418056545792871256481555812420390351647277057,462428252436731001462884654101636424188009906177,32113073085884097323811434312613640568611799040001
%N A282400 Primes of the form n^2*2^n + 1.
%H A282400 Abhiram R Devesh, <a href="/A282400/b282400.txt">Table of n, a(n) for n = 1..15</a>
%t A282400 Select[Table[n^2 2^n+1,{n,200}],PrimeQ] (* _Harvey P. Dale_, Mar 26 2023 *)
%o A282400 (Python)
%o A282400 import sympy
%o A282400 n = 1
%o A282400 while n < 100:
%o A282400 q = (n**2) * (2**n) + 1
%o A282400 if sympy.isprime(q):
%o A282400 print(q)
%o A282400 n += 1
%Y A282400 Subset of A248917.
%Y A282400 Cf. A058780 Numbers n such that n^2 * 2^n + 1 is prime.
%Y A282400 Cf. A279904 Primes of the form n^2*2^n - 1.
%K A282400 nonn,easy
%O A282400 1,1
%A A282400 _Abhiram R Devesh_, Feb 19 2017