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A233678 as a simple table

na(n)
12440
223568
3216592
42442208
525036784
6289389648
73057995568
835239626640
9377551693872
104321333099024
1146708511630640
12531289387089424
135779703369824304
1465409280729909520
15715049970687872816

[2440,23568,216592,2442208,25036784,289389648,
 3057995568,35239626640,377551693872,4321333099024,
 46708511630640,531289387089424,5779703369824304,
 65409280729909520,715049970687872816]