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A267581 as a simple table

na(n)
01
13
26
313
426
553
6107
7215
8430
9861
101723
113447
126895
1313791
1427583
1555167
16110334
17220669
18441339
19882679
201765359
213530719
227061439
2314122879
2428245759
2556491519
26112983039
27225966079
28451932159
29903864319
301807728639
313615457279
327230914558

[1,3,6,13,26,53,107,215,430,861,1723,3447,6895,
 13791,27583,55167,110334,220669,441339,882679,
 1765359,3530719,7061439,14122879,28245759,
 56491519,112983039,225966079,451932159,903864319,
 1807728639,3615457279,7230914558]