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A264522 as a simple table

na(n)
10
20
336
4228
51444
68018
744521
8258264
91498176
108784648
1151509329
12298721094
131732390884
1410048882704
1558289410624
16338365016544
171964179826064
1811397166993164
1966132140115889
20383699043436626
212226223976362884

[0,0,36,228,1444,8018,44521,258264,1498176,
 8784648,51509329,298721094,1732390884,10048882704,
 58289410624,338365016544,1964179826064,
 11397166993164,66132140115889,383699043436626,
 2226223976362884]