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 A290438 #7 Aug 28 2017 01:02:19 %S A290438 1,1,3,3,12,20,39,64,116,210,438,966,2089,4155,8032,15657,30325,58379, %T A290438 112885 %N A290438 a(n) = A289676(3*n). %C A290438 No formulas or recurrences are known for the important sequences A289670 and A289671. The essence of these two sequences is captured in the six entries A290436-A290441. Any numerical properties of these would be most welcome. %Y A290438 Cf. A284116, A284119, A284121, A289670-A289677, A290436-A290441. %K A290438 nonn,more %O A290438 1,3 %A A290438 _N. J. A. Sloane_, Aug 02 2017