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A049612 as a simple table

na(n)
00
11
25
319
463
5192
6552
71520
84048
910496
1026624
1166304
12162560
13393216
14940032
152224128
165214208
1712124160
1827983872
1964159744
20146210816
21331350016
22747110400
231676673024
243746562048
258338276352
2618488492032

[0,1,5,19,63,192,552,1520,4048,10496,26624,66304,
 162560,393216,940032,2224128,5214208,12124160,
 27983872,64159744,146210816,331350016,747110400,
 1676673024,3746562048,8338276352,18488492032]