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 A154682 #13 Dec 16 2013 00:00:45 %S A154682 0,4,368,94932,45136576,33739007300,36314872537968,53132088082450132, %T A154682 101388548387203175168,244552822542936127033092, %U A154682 727457992333704231799337200,2616052459228913777816325459284,11187876119071565503348037263205568 %N A154682 (2n-1)^(2n+1) + (2n+1)^(2n-1). %C A154682 All the terms are divisible by 4. %C A154682 a(n) is divisible by (2n)^2 for n>0. a(n) = (2n)^2 * A233446(n) for n>0. - _Alexander Adamchuk_, Dec 10 2013 %F A154682 a(n) = (2n-1)^(2n+1) + (2n+1)^(2n-1); n>=0. %Y A154682 First differences of A154569. Cf. A233446. %K A154682 nonn %O A154682 0,2 %A A154682 Avik Roy (avik_3.1416(AT)yahoo.co.in), Jan 14 2009