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 A376764 #6 Oct 30 2024 15:33:45 %S A376764 3,8,15,33,63,132,260,528,1057,2123,4236,8464,16932,33860,67732, %T A376764 135453,270927,541836,1083716,2167408,4334796,8669604,17339208, %U A376764 34678448,69356872,138713720,277427448,554854896,1109709804,2219419612,4438839324,8877678536,17755357084,35510714180,71021428384,142042856736 %N A376764 Length of n-th region in A376198. %C A376764 We define a region in A376198 to consist of a maximal string of non-prime terms followed by a string of prime terms. %F A376764 Apart from the initial 3, this is the first differences of A376752. %F A376764 This is also, very approximately, the sum of A376763 and a subsequence of A063124. %e A376764 The first two regions in A376198 consist of terms 1 to 3 (of length a(1) = 3) and terms 4 to 11 (of length a(2) = 8). %Y A376764 Cf. A063124, A376198, A376752, A376763. %K A376764 nonn %O A376764 1,1 %A A376764 _N. J. A. Sloane_, Oct 30 2024