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A307696 as a simple table

na(n)
12
27
334
4200
51318
69354
769864
8541323
94310950
1035066384
11290081932
122432766082
1320635672664
14176727482860
151526000459400
1613270616752680
17116124930068670
181021736927603190
199033726534916920
2080220639767921370
21715166816624282820
226398357633173869600

[2,7,34,200,1318,9354,69864,541323,4310950,
 35066384,290081932,2432766082,20635672664,
 176727482860,1526000459400,13270616752680,
 116124930068670,1021736927603190,9033726534916920,
 80220639767921370,715166816624282820,
 6398357633173869600]