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%I #9 Feb 12 2019 08:41:47
%S 0,0,3,14,75,454,3185,25486,229383,2293838,25232229,302786758,
%T 3936227867,55107190150,826607852265,13225725636254,224837335816335,
%U 4047072044694046,76894368849186893,1537887376983737878
%N a(n) = A002467(n) - 1.
%C n divides a(n) and a(n+2) for odd n. 2 divides a(n) for even n. - _Alexander Adamchuk_, Jan 11 2008
%H Alexander Adamchuk, Jan 11 2008, <a href="/A133798/b133798.txt">Table of n, a(n) for n = 1..51</a>
%H E. W. Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/Mousetrap.html">Mousetrap</a>.
%t Denominator[k=1; NestList[1+1/(k++ #1)&, 1, 50]] - 1 (* _Alexander Adamchuk_, Jan 11 2008 *)
%Y Cf. A002467.
%K nonn
%O 1,3
%A _Zak Seidov_, Jan 07 2008
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