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A061174 as a simple table

na(n)
015
1545
27043
357560
4365045
51970905
69520315
742385132
8177293730
9705980760
102701362950
1110001654350
1236020160943
13126701700755
14436709397085
151478813477920
164930328078835
1716212542696607

[15,545,7043,57560,365045,1970905,9520315,
 42385132,177293730,705980760,2701362950,
 10001654350,36020160943,126701700755,436709397085,
 1478813477920,4930328078835,16212542696607]