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%I #9 Oct 20 2024 23:53:14
%S 8,40,680,231880,21507565640,231287689900961870440,
%T 21397598199889399837872215012598300187880,
%U 228928604361955042169940915981517711585578107873998357253128210226981219949635080
%N a(n) = denominator of the sum S(n) defined in A376184.
%H N. J. A. Sloane, <a href="https://www.youtube.com/watch?v=3RAYoaKMckM">A Nasty Surprise in a Sequence and Other OEIS Stories</a>, Experimental Mathematics Seminar, Rutgers University, Oct 10 2024, Youtube video; <a href="https://sites.math.rutgers.edu/~zeilberg/expmath/sloane85BD.pdf">Slides</a> [Mentions this sequence]
%e The initial values of S(n) are 5/8, 37/40, 677/680, 231877/231880, 21507565637/21507565640, 231287689900961870437/231287689900961870440, ...
%Y Cf. A004168, A082732, A374663, A375516, A375531, A375532, A375781, A375522, A376048-A376062, A376184, A376185.
%K nonn,frac,base
%O 1,1
%A _N. J. A. Sloane_, Sep 15 2024