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 A098105 #10 Mar 03 2022 12:43:49
%S A098105 0,-1,7,79,1927,8023,130783,523927,8388079,536870071,2147482687,
%T A098105 137438952103,2199023253871,8796093020359,140737488353119,
%U A098105 9007199254738183,576460752303420007,2305843009213690231,147573952589676408439,2361183241434822601807,9444732965739290422063,604462909807314587346847,9671406556917033397642519
%N A098105 a(n) = 2^p - p^2 where p is the n-th prime.
%D A098105 E.-B. Escott, Note #1642, L'Intermédiaire des Mathématiciens, 8 (1901), page 12. - _N. J. A. Sloane_, Mar 02 2022
%t A098105 Table[2^Prime[n] - Prime[n]^2, {n, 20}] (* _Robert G. Wilson v_, Sep 23 2004 *)
%Y A098105 Cf. A097201, A097202.
%K A098105 sign
%O A098105 1,3
%A A098105 _Parthasarathy Nambi_, Sep 22 2004
%E A098105 More terms from _Robert G. Wilson v_, Sep 23 2004