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A140713 as a simple table

na(n)
21
35
41
526
69
72
8154
970
1026
116
121044
13562
14268
15102
1624
178028
184860
192700
201308
21504
22120
2369264
2445756
2528224
2615828
277728
283000
29720

[1,5,1,26,9,2,154,70,26,6,1044,562,268,102,24,
 8028,4860,2700,1308,504,120,69264,45756,28224,
 15828,7728,3000,720]