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A307655 as a simple table

na(n)
12
213
3178
489
57930
63965
71982
8991
9982090
10491045
11245522
12122761
1315070263130
147535131565
153767565782
161883782891
17941891445
18470945722
19235472861
20117736430
2158868215
2229434107
2314717053
247358526
253679263
261839631

[2,13,178,89,7930,3965,1982,991,982090,491045,
 245522,122761,15070263130,7535131565,3767565782,
 1883782891,941891445,470945722,235472861,
 117736430,58868215,29434107,14717053,7358526,
 3679263,1839631]