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A074414 as a simple table

na(n)
11
20
30
46
524
6104
7432
81950
98736
1039298
11177784
12813748
133755048
1417438400
1581380192
16381468750
171795133272
188477100632
1940154790296
20190735234220
21908261625600
224334883167500
2320732048658288
2499341074218100
25476837158203000
262292486335637500

[1,0,0,6,24,104,432,1950,8736,39298,177784,813748,
 3755048,17438400,81380192,381468750,1795133272,
 8477100632,40154790296,190735234220,908261625600,
 4334883167500,20732048658288,99341074218100,
 476837158203000,2292486335637500]