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A264876 as a simple table

na(n)
10
220
3228
42348
522400
6207424
71946752
818265856
9171168256
101602206720
1114987712512
12140201013248
131311499247616
1412268128616448
15114758535184384
161073466206519296
1710041325376634880
1893927687502692352
19878609985428783104

[0,20,228,2348,22400,207424,1946752,18265856,
 171168256,1602206720,14987712512,140201013248,
 1311499247616,12268128616448,114758535184384,
 1073466206519296,10041325376634880,
 93927687502692352,878609985428783104]