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A129003 as a simple table

na(n)
16
2108
3972
46480
536450
6183708
7857304
83779136
915943230
1064953900
11257217444
12994857552
133772168218
1414061928860
1551656065200
16187339329792
17671787127926
182384960530284
198391527791740
2029288988968400
21101486346775506

[6,108,972,6480,36450,183708,857304,3779136,
 15943230,64953900,257217444,994857552,3772168218,
 14061928860,51656065200,187339329792,671787127926,
 2384960530284,8391527791740,29288988968400,
 101486346775506]