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A284843 as a simple table

na(n)
13
212
355
4318
52163
616952
7150183
81483290
916153027
10192234372
112481692343
1234538108822
13515428409715
148210201868528
15139028223047143
162493848817565362
1747236883312958723
18942120664413581180
1919735072617803491767
20433187081497364626542

[3,12,55,318,2163,16952,150183,1483290,16153027,
 192234372,2481692343,34538108822,515428409715,
 8210201868528,139028223047143,2493848817565362,
 47236883312958723,942120664413581180,
 19735072617803491767,433187081497364626542]