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A302686 as a simple table

na(n)
01
11
22
321
4596
532805
62960496
7396523540
873803150440
918216533196693
105757491981210470
112267526164705341925
121088820552191787545688
13626169526288460672060244
14424903177461959840892846066
15335946105815409394263421836000
16306145042287138023678922165314512

[1,1,2,21,596,32805,2960496,396523540,73803150440,
 18216533196693,5757491981210470,
 2267526164705341925,1088820552191787545688,
 626169526288460672060244,
 424903177461959840892846066,
 335946105815409394263421836000,
 306145042287138023678922165314512]