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A002534 as a simple table

na(n)
00
11
22
313
444
5205
6806
73457
814168
959449
10246410
111027861
124273412
1317797573
1474055854
15308289865
161283082416
175340773617
1822229288978
1992525540509
20385114681820
211602959228221
226671950592822
2327770534239633
24115588623814664

[0,1,2,13,44,205,806,3457,14168,59449,246410,
 1027861,4273412,17797573,74055854,308289865,
 1283082416,5340773617,22229288978,92525540509,
 385114681820,1602959228221,6671950592822,
 27770534239633,115588623814664]