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A006425 as a simple table

na(n)
14
279
3900
47885
559080
6398846
72499096
814805705
983969600
10459868530
112447439384
1212718070274
1364766697520
14324156347260
151598200903280
167776728909121
1737404399901296
18178060831286890
19839857764202520
203928581810398630
2118239060530882224
2284101317494787684

[4,79,900,7885,59080,398846,2499096,14805705,
 83969600,459868530,2447439384,12718070274,
 64766697520,324156347260,1598200903280,
 7776728909121,37404399901296,178060831286890,
 839857764202520,3928581810398630,
 18239060530882224,84101317494787684]