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 A364535 #51 Oct 27 2023 14:45:38 %S A364535 1,1,1,3,9,20,44,93,191,390,787,1600,3250,6563,13227,26609,53484, %T A364535 107588,216413,434894,872834,1750938,3512454,7043770,14119562, %U A364535 28300792,56733873,113746102,228033527,456999525,915558925,1834081043,3674191081,7361544506,14749015536,29545860199,59169406092 %N A364535 a(n) is the number of subsets of the first n primes whose sum is not a prime. %H A364535 Alois P. Heinz, <a href="/A364535/b364535.txt">Table of n, a(n) for n = 0..1000</a> %F A364535 a(n) = 2^n - A071810(n). %F A364535 a(n) = A000295(n) - A262765(n) + 1 for n > 2. %Y A364535 Cf. A000040, A000295, A071810, A262765. %K A364535 nonn %O A364535 0,4 %A A364535 _Darío Clavijo_, Oct 20 2023