| 1, 1, 2, 2, 6, 6, 18, 20, 50, 74, 186, 216, 630, 916, 2002, 3040, 7710, 10806, 27594, 40642, 94658, 158492, 364722, 516682, 1333926, 2180772, 4770374, 7845774, 18512790, 28706044, 69273666, 111116576, 251853466, 436650938, 977895330
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