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A218302 as a simple table

na(n)
01
14
240
3496
47488
5134784
62836736
768635648
81881948160
957777184768
101965962575872
1173503311167488
122997314388623360
13132455836580577280
146308164435588415488
15322185156718017642496
1617571327124936467677184
171019377026461494381903872

[1,4,40,496,7488,134784,2836736,68635648,
 1881948160,57777184768,1965962575872,
 73503311167488,2997314388623360,
 132455836580577280,6308164435588415488,
 322185156718017642496,17571327124936467677184,
 1019377026461494381903872]