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A283799 as a simple table

na(n)
01
12
25
312
436
590
6286
7728
82380
96120
1020349
1152668
12177100
13460460
141560780
154071600
1613884156
1736312408
18124403620
19326023280
201121099408
212942885946
2210150595910
2326681566392
2492263734836
25242799302200
26841392966470
272216352204360
287694644696200

[1,2,5,12,36,90,286,728,2380,6120,20349,52668,
 177100,460460,1560780,4071600,13884156,36312408,
 124403620,326023280,1121099408,2942885946,
 10150595910,26681566392,92263734836,242799302200,
 841392966470,2216352204360,7694644696200]