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A004661 as a simple table

na(n)
01
13
212
336
4144
5465
62061
76243
825062
9111246
10334104
111335315
124342251
1316360113
1455440342
15232651356
161031614434
173125446635
1812413006541
1940542026253
20152256115122
21520134351366
222160436414464

[1,3,12,36,144,465,2061,6243,25062,111246,334104,
 1335315,4342251,16360113,55440342,232651356,
 1031614434,3125446635,12413006541,40542026253,
 152256115122,520134351366,2160436414464]