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A252626 as a simple table

na(n)
1405044
25013608
3118551272
42894745288
572359809802
61811913699224
745371704729062
81137317580721148
928509333379628144
10714577961821004794
1117911976379170153868
12448990730607000485512
1311254523930303304555260

[405044,5013608,118551272,2894745288,72359809802,
 1811913699224,45371704729062,1137317580721148,
 28509333379628144,714577961821004794,
 17911976379170153868,448990730607000485512,
 11254523930303304555260]