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A268619 as a simple table

na(n)
12
21
32
44
510
625
770
8200
9600
101845
115830
1218772
1361542
14204659
15689410
162347920
178074762
1828009524
1997909318
20344615860
211220539390
224347310451
2315564141262
2455985418344
25202256970300
26733607281875
272670698800548
289755982857964
2935751803209918
30131405090455065
31484316704740126
321789672012052256

[2,1,2,4,10,25,70,200,600,1845,5830,18772,61542,
 204659,689410,2347920,8074762,28009524,97909318,
 344615860,1220539390,4347310451,15564141262,
 55985418344,202256970300,733607281875,
 2670698800548,9755982857964,35751803209918,
 131405090455065,484316704740126,1789672012052256]