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A050184 as a simple table

na(n)
00
11
24
318
470
5273
61026
73876
814520
954477
10204248
11766935
122882934
1310855425
1440939888
15154663938
16585260496
172218309470
188421352956
1932018897274
20121918083980
21464879984481
221774996216144
236785967883800

[0,1,4,18,70,273,1026,3876,14520,54477,204248,
 766935,2882934,10855425,40939888,154663938,
 585260496,2218309470,8421352956,32018897274,
 121918083980,464879984481,1774996216144,
 6785967883800]