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A204686 as a simple table

na(n)
01
11
22
36
418
562
6228
7869
83410
913663
1055689
11230276
12963851
134076429
1417394641
1574798044
16323797908
171409980003
186171824159
1927141256911
20119854448404
21531261779875
222362873352568
2310541865261557
2447165485163426
25211572830443060
26951338664998601
274287174496933723

[1,1,2,6,18,62,228,869,3410,13663,55689,230276,
 963851,4076429,17394641,74798044,323797908,
 1409980003,6171824159,27141256911,119854448404,
 531261779875,2362873352568,10541865261557,
 47165485163426,211572830443060,951338664998601,
 4287174496933723]