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A220106 as a simple table

na(n)
14
216
356
4250
5984
63888
715798
863092
9252064
101010554
114040556
1216155482
1364620946
14258358476
151032891644
164129483594
1716508060352
1865991303276
19263798841494
201054506124776
214215228829600
2216849633947562
2367352986553090

[4,16,56,250,984,3888,15798,63092,252064,1010554,
 4040556,16155482,64620946,258358476,1032891644,
 4129483594,16508060352,65991303276,263798841494,
 1054506124776,4215228829600,16849633947562,
 67352986553090]