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 A056647 #10 Sep 28 2024 07:38:10 %S A056647 1,1,1,1,1,4,1,1,9,36,1,4,4,1,9,9,1,4,1,4,4,1,1,4,100,25,100,25,9,144, %T A056647 9,9,1,4,25,100,100,25,9,36,4,1,4,1,25,400,225,900,1764,441,196,49,49, %U A056647 784,4,1,1,16,1,16,16,4,441,441,49,196,49,196,36,9,1,4,4,1,100,25,1225 %N A056647 a(n) = A056623(A001405(n)). %C A056647 Previous name "Largest unitary square divisor of central binomial coefficient" was incorrect. See A376553 for the correct sequence with this name. - _Amiram Eldar_, Sep 28 2024 %F A056647 a(n) = A008833(A001405(n))/A055229(A001405(n))^2 = A056057(n)/A056059(n)^2. %e A056647 a(28) = A056623(binomial(28,14)) = A056623(40116600) = 25. %Y A056647 Cf. A001405, A008833, A055229, A056056, A056057, A056059, A056623, A376553. %K A056647 nonn %O A056647 1,6 %A A056647 _Labos Elemer_, Aug 09 2000 %E A056647 Incorrect name replaced with a formula by _Amiram Eldar_, Sep 28 2024