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 A319804 #17 Aug 07 2024 16:50:27
%S A319804 0,2,4,6,5,10,15,20,10,15,20,25,15,20,25,30,17,25,42,59,25,42,59,76,
%T A319804 42,59,67,84,59,76,84,92,34,42,50,67,42,59,67,84,50,67,84,101,67,84,
%U A319804 101,109,51,59,67,75,59,76,84,92,67,84,101,109,75,92,109,126,65,85,150,215
%N A319804 a(n) = A319720(n) + A319652(n).
%C A319804 This sequence is different from A055948.
%H A319804 Seiichi Manyama, <a href="/A319804/b319804.txt">Table of n, a(n) for n = 0..4095</a>
%t A319804 Table[FromDigits[Reverse[#], 4] + FromDigits[#, 4] & [Sort[IntegerDigits[n, 4]]], {n, 0, 100}] (* _Paolo Xausa_, Aug 07 2024 *)
%o A319804 (PARI) a(n) = my(nd=digits(n, 4)); fromdigits(vecsort(nd), 4) + fromdigits(vecsort(nd,,4), 4); \\ _Michel Marcus_, Sep 28 2018
%Y A319804 Base b: A319785 (b=2), A319803 (b=3), this sequence (b=4), A319805 (b=5), A319806 (b=6), A319807 (b=7), A319808 (b=8), A319747 (b=9), A052008 (b=10).
%Y A319804 Cf. A055948, A319652, A319720.
%K A319804 nonn,base
%O A319804 0,2
%A A319804 _Seiichi Manyama_, Sep 28 2018