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A090031 as a simple table

na(n)
01
12
24
310
426
564
6159
7366
8862
91904
104538
1110238
1224098
1353186
14123435
15268416
16616374
171326882
183021126
196438828
2014524718
2130633586
2268513713
23143106496
24317305688
25656178756
261442068376
272951523620
286427133737
2913014920506
3028070588413
3156212979470
32120030667717

[1,2,4,10,26,64,159,366,862,1904,4538,10238,24098,
 53186,123435,268416,616374,1326882,3021126,
 6438828,14524718,30633586,68513713,143106496,
 317305688,656178756,1442068376,2951523620,
 6427133737,13014920506,28070588413,56212979470,
 120030667717]