A054102 T(n,n-2), array T as in A054098.
1, 6, 8, 36, 142, 750, 4604, 32876, 266966, 2431614, 24554188, 272289636, 3289836254, 43017800318, 605289111692, 9119314568460, 146474344313974, 2498617856687406
Offset: 2
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