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A288897 as a simple table

na(n)
01
12
25
312
427
557
6117
7242
8493
9994
102001
114038
128113
1316274
1432589
1565330
16130765
17261682
18523533
191047666
202095885
214192562
228385741
2316773426
2433549517
2567102002
26134205645
27268420914
28536851469
291073713650
302147438093
314294914546
328589853325

[1,2,5,12,27,57,117,242,493,994,2001,4038,8113,
 16274,32589,65330,130765,261682,523533,1047666,
 2095885,4192562,8385741,16773426,33549517,
 67102002,134205645,268420914,536851469,1073713650,
 2147438093,4294914546,8589853325]