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A006975 as a simple table

na(n)
01
111
272
3364
41568
56048
621504
771808
8228096
9695552
102050048
115870592
1216400384
1344843008
14120324096
15317521920
16825556992
172118057984
185369233408
1913463453696
2033426505728
2182239815680
22200655503360
23485826232320

[1,11,72,364,1568,6048,21504,71808,228096,695552,
 2050048,5870592,16400384,44843008,120324096,
 317521920,825556992,2118057984,5369233408,
 13463453696,33426505728,82239815680,200655503360,
 485826232320]