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A266248 as a simple table

na(n)
01
12
25
310
421
543
686
7173
8346
9693
101386
112773
125546
1311093
1422186
1544373
1688746
17177493
18354986
19709973
201419946
212839893
225679786
2311359573
2422719146
2545438293
2690876586
27181753173
28363506346
29727012693
301454025386
312908050773
325816101546
3311632203093

[1,2,5,10,21,43,86,173,346,693,1386,2773,5546,
 11093,22186,44373,88746,177493,354986,709973,
 1419946,2839893,5679786,11359573,22719146,
 45438293,90876586,181753173,363506346,727012693,
 1454025386,2908050773,5816101546,11632203093]