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A127628 as a simple table

na(n)
01
16
242
3300
42154
515492
6111492
7802584
85778090
941600532
10299517996
112156509416
1215526797252
13111792690600
14804906480840
155795323452720
1641726317225770
17300429441596340
182163091823919900
1915574260559056840
20112134673904493420
21807369644235408120

[1,6,42,300,2154,15492,111492,802584,5778090,
 41600532,299517996,2156509416,15526797252,
 111792690600,804906480840,5795323452720,
 41726317225770,300429441596340,2163091823919900,
 15574260559056840,112134673904493420,
 807369644235408120]