A081161 Number of even cycles in range [A014137(2n)..A014138(2n)] of permutation A057505/A057506, with two fixed-points of A057164.
0, 1, 4, 16, 60, 225, 848, 3188, 12095
Offset: 0
Formula
a(n) = A081160(2n+1).
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