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A374548 as a simple table

na(n)
01
11
22
35
414
542
6132
7431
81452
95026
1017808
1164398
12237097
13886935
143365348
1512933691
1650285912
17197586405
18783922944
193138088910
2012666148475
2151517864816
22211047556685
23870385025022
243612193740355
2515079839929453
2663305470339527
27267159465034792

[1,1,2,5,14,42,132,431,1452,5026,17808,64398,
 237097,886935,3365348,12933691,50285912,197586405,
 783922944,3138088910,12666148475,51517864816,
 211047556685,870385025022,3612193740355,
 15079839929453,63305470339527,267159465034792]