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 A053390 #9 May 08 2022 23:41:36 %S A053390 1,1,2,2,1,1,4,4,1,1,2,2,1,1,4,4,1,1,2,2,1,1,5,5,1,1,2,2,1,1,5,5,1,1, %T A053390 2,2,1,1,4,4,1,1,2,2,1,1,4,4,1,1,2,2,1,1,6,6,1,1,2,2,1,1,6,6,1,1,2,2, %U A053390 1,1,4,4,1,1,2,2,1,1,4,4,1,1,2,2,1,1,5,5,1,1,2,2,1,1,5,5,1,1,2,2,1,1,4,4,1 %N A053390 a(n) = A053398(10, n). %H A053390 Reinhard Zumkeller, <a href="/A053390/b053390.txt">Table of n, a(n) for n = 1..1000</a> %o A053390 (Haskell) %o A053390 a053390 = flip a053398 10 . (+ 9) -- _Reinhard Zumkeller_, Aug 04 2014 %Y A053390 Cf. A053398. %K A053390 nonn %O A053390 1,3 %A A053390 _David W. Wilson_