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%I #4 Sep 16 2021 03:47:38
%S 0,2,-12,230,-6936,316682,-20359332,1754340590,-195242324016,
%T 27266796955922,-4669829301365052,962523286888757750,
%U -235056895264868039496,67119429827860669710362
%N a(n) = Permanent(T(2*n + 1)) where T(n) is the tangent matrix defined in A346831. Bisection of A347598 (odd indices).
%Y Cf. A347598, A346831.
%K sign,more
%O 0,2
%A _Peter Luschny_, Sep 14 2021
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