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A297297 as a simple table

na(n)
11
26
317
450
5157
6495
71574
85031
916123
1051749
11166241
12534301
131717724
145523165
1517760715
1657115518
17183679098
18590706934
191899713778
206109510235
2119648337645
2263189642502
23203219959503
24653562362810
252101879559822
266759719676624

[1,6,17,50,157,495,1574,5031,16123,51749,166241,
 534301,1717724,5523165,17760715,57115518,
 183679098,590706934,1899713778,6109510235,
 19648337645,63189642502,203219959503,653562362810,
 2101879559822,6759719676624]