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 A070290 #16 Oct 07 2023 05:06:14
%S A070290 8,4,24,2,40,12,56,1,72,20,88,6,104,28,120,2,136,36,152,10,168,44,184,
%T A070290 3,200,52,216,14,232,60,248,4,264,68,280,18,296,76,312,5,328,84,344,
%U A070290 22,360,92,376,6,392,100,408,26,424,108,440,7,456,116,472,30,488
%N A070290 a(n) = lcm(8,n)/gcd(8,n).
%H A070290 <a href="/index/Rec#order_16">Index entries for linear recurrences with constant coefficients</a>, signature (0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,-1)
%F A070290 a(n) = A109049(n) / A109011(n). - _R. J. Mathar_, Feb 12 2019
%F A070290 a(n) = 2*a(n-8)-a(n-16). - _R. J. Mathar_, Feb 12 2019
%F A070290 Sum_{k=1..n} a(k) ~ (293/128)*n^2. - _Amiram Eldar_, Oct 07 2023
%t A070290 LinearRecurrence[{0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,-1}, {8,4,24,2,40,12,56,1,72,20,88,6,104,28,120,2}, 37] (* _Georg Fischer_, Feb 27 2019 *)
%Y A070290 Cf. A070291, A070292, A070293, A109011, A109049.
%K A070290 easy,nonn
%O A070290 1,1
%A A070290 _Amarnath Murthy_, May 10 2002