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 A122241 #13 Jul 24 2025 00:09:04 %S A122241 4,22,54,169,516,1841,6076,19256,66140,252691,888179,2900616 %N A122241 Iterates of A122237, starting from 4. %C A122241 It might be more natural to use offset 0 for the initial value a(0) = 4 since that's not the result of an actual iteration of the map A122237. However, some other sequences (A122242, A179845, A179841, ...?) depend on this and have b-files that would require to be changed. - _M. F. Hasler_, Jul 18 2025 %F A122241 a(n+1) = A122237(a(n)) for n >= 1; a(1) = 4. %o A122241 (Scheme) (define (A122241 n) (if (= 1 n) 4 (A122237 (A122241 (- n 1))))) %Y A122241 Cf. A122237 = A057548 o A082358, A122242 = A014486 o A122241. %K A122241 nonn %O A122241 1,1 %A A122241 _Antti Karttunen_, Sep 14 2006