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A274801 as a simple table

na(n)
116
2164
31572
416328
5169328
61774372
718476064
8193292660
92016460140
1021072173792
11219985654388
122297904486000
1323995177354892
14250610794543168
152617142836973944
1627332712382107996
17285444819027741180

[16,164,1572,16328,169328,1774372,18476064,
 193292660,2016460140,21072173792,219985654388,
 2297904486000,23995177354892,250610794543168,
 2617142836973944,27332712382107996,
 285444819027741180]