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A256742 as a simple table

na(n)
1393
2570
31564
42512
56352
612280
728816
860728
9137768
10311200
11695592
121606920
133675600
148477144
1519719880
1645890144
17107177032
18251576104
19590847248
201391314808
213284435240
227758601632
2318359082728
2443496258888
25103115774544

[393,570,1564,2512,6352,12280,28816,60728,137768,
 311200,695592,1606920,3675600,8477144,19719880,
 45890144,107177032,251576104,590847248,1391314808,
 3284435240,7758601632,18359082728,43496258888,
 103115774544]