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A250343 as a simple table

na(n)
1648
246941
3682576
45156313
526422104
6104374957
7341862816
8971811153
92472291496
105751557757
1112430964976
1225260273961
1348707132280
1489770507149
15159076528960
16272324585505
17452161586376
18730573094557
191151891497872

[648,46941,682576,5156313,26422104,104374957,
 341862816,971811153,2472291496,5751557757,
 12430964976,25260273961,48707132280,89770507149,
 159076528960,272324585505,452161586376,
 730573094557,1151891497872]