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A265474 as a simple table

na(n)
11
26
336
4366
54900
655800
7970225
811095448
9204833344
101934752250
1144951208289
12364393934784
1310048532283364
1466162689956152
152276670647380900
1612030558414011074
17521323759854121156
182167321703073344910

[1,6,36,366,4900,55800,970225,11095448,204833344,
 1934752250,44951208289,364393934784,
 10048532283364,66162689956152,2276670647380900,
 12030558414011074,521323759854121156,
 2167321703073344910]