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A375616 as a simple table

na(n)
00
11
25
336
4350
54320
664827
71146880
823383404
9540000000
1013933327265
11397303087104
1212407264266410
13421154777645056
1415439814208984375
15607985949695016960
1625593429637028941208
171146928904801167933440
1854515427164280400691709
192739404800000000000000000

[0,1,5,36,350,4320,64827,1146880,23383404,
 540000000,13933327265,397303087104,12407264266410,
 421154777645056,15439814208984375,
 607985949695016960,25593429637028941208,
 1146928904801167933440,54515427164280400691709,
 2739404800000000000000000]