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A100328 as a simple table

na(n)
01
14
220
3116
4736
54952
634716
7250868
81855520
913979192
10106901032
11827644424
126474611984
1351100656544
14406400018092
153253636464756
1626201323746880
17212093247874904
181724793778005528
1914084738953391768
20115447965121881856

[1,4,20,116,736,4952,34716,250868,1855520,
 13979192,106901032,827644424,6474611984,
 51100656544,406400018092,3253636464756,
 26201323746880,212093247874904,1724793778005528,
 14084738953391768,115447965121881856]