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A344273 as a simple table

na(n)
11
26
324
480
5273
6960
73336
811480
939648
10136952
11472416
121630164
135625480
1419412736
1566992016
16231184800
17797806152
182753187210
199501109380
2032787848746

[1,6,24,80,273,960,3336,11480,39648,136952,472416,
 1630164,5625480,19412736,66992016,231184800,
 797806152,2753187210,9501109380,32787848746]