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A253352 as a simple table

na(n)
1125
2735
34800
431156
5200740
61294016
78338384
853745952
9346434848
102233207264
1114396108256
1292804450272
13598267360480
143856769267168
1524862957621984
16160281121228768
171033266051966176
186661040300308960
1942940986249529056

[125,735,4800,31156,200740,1294016,8338384,
 53745952,346434848,2233207264,14396108256,
 92804450272,598267360480,3856769267168,
 24862957621984,160281121228768,1033266051966176,
 6661040300308960,42940986249529056]