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A037504 as a simple table

na(n)
11
25
315
446
5140
6420
71261
83785
911355
1034066
11102200
12306600
13919801
142759405
158278215
1624834646
1774503940
18223511820
19670535461
202011606385
216034819155
2218104457466
2354313372400
24162940117200
25488820351601

[1,5,15,46,140,420,1261,3785,11355,34066,102200,
 306600,919801,2759405,8278215,24834646,74503940,
 223511820,670535461,2011606385,6034819155,
 18104457466,54313372400,162940117200,488820351601]