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A281594 as a simple table

na(n)
01
11
22
35
414
542
666
7429
81430
94862
108398
1158786
12104006
1374290
14222870
153231615
1611785890
17129644790
1847763870
191767263190
203282060210
2112233133510
2222870640910
2322870640910
24214984024554
25115760628606
26655976895434
2734766775458002
2865936987937590

[1,1,2,5,14,42,66,429,1430,4862,8398,58786,104006,
 74290,222870,3231615,11785890,129644790,47763870,
 1767263190,3282060210,12233133510,22870640910,
 22870640910,214984024554,115760628606,
 655976895434,34766775458002,65936987937590]