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 A349378 #8 Nov 25 2021 20:01:33
%S A349378 2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,-6,0,0,0,10,9,0,0,-8,0,-30,0,
%T A349378 -4,0,0,24,27,0,0,0,34,0,-40,0,-14,-6,0,0,-34,16,-66,0,-14,0,10,42,44,
%U A349378 0,0,0,166,0,0,-8,11,42,-70,0,-20,0,-172,0,-70,0,0,-42,-22,56,-70,0,-103,1,0,0,216,60,0,0,78
%N A349378 a(n) = A349376(n) + A349377(n).
%H A349378 Antti Karttunen, <a href="/A349378/b349378.txt">Table of n, a(n) for n = 1..20000</a>
%F A349378 a(1) = 2, and for n >1, a(n) = -Sum_{d|n, 1<d<n} A349376(d) * A349377(n/d). [As the sequences are Dirichlet inverses of each other]
%o A349378 (PARI) A349378(n) = (A349376(n)+A349377(n)); \\ Needs also code from A349376 and A349377.
%Y A349378 Cf. A006368, A006369, A349376, A349377.
%Y A349378 Cf. also A349352, A349369.
%K A349378 sign
%O A349378 1,1
%A A349378 _Antti Karttunen_, Nov 17 2021