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A256526 as a simple table

na(n)
116
224
3458
418341
516641
61116830
710971256
8105969200
9193295556
1048221950695
1172585186028

[16,24,458,18341,16641,1116830,10971256,105969200,
 193295556,48221950695,72585186028]