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A283518 as a simple table

na(n)
10
25
3270
45988
5113984
62032993
734279720
8558718061
98877675769
10138361189406
112123703646624
1232194034680888
13483025956805625
147184039753675004
15106048960050497877
161555282253332563953
1722678862678133637034

[0,5,270,5988,113984,2032993,34279720,558718061,
 8877675769,138361189406,2123703646624,
 32194034680888,483025956805625,7184039753675004,
 106048960050497877,1555282253332563953,
 22678862678133637034]