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 A090229 #6 Jul 05 2022 11:36:16 %S A090229 1,0,7,13,13,21,89,233,233,377,1597,1597,2584,4181,6765,28657,28657, %T A090229 46368,75025,121393,514229,514229,832040,1346269,2178309,3524578, %U A090229 5702887,9227465,14930352 %N A090229 Differences between consecutive nonprime Fibonacci numbers (A090206). %F A090229 F(0) = 0; F(1) = 1; F(n) = F(n-1) + F(n-2); F(0:9) = 0, 1, 1, 2, 3, 5, 8, 13, 21, 34 nonprimes: 0, 1, 1, 8, 21 differences between consecutive nonprimes: 1, 0, 7, 13 %Y A090229 Cf. A090206. %K A090229 easy,nonn %O A090229 0,3 %A A090229 _Felix Tubiana_, Jan 22 2004