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A261474 as a simple table

na(n)
00
12
212
352
4168
5461
61133
72612
85759
912309
1025666
1152509
12105803
13210655
14415349
15812461
161578752
173050921
185868562
1911244267
2021472441
2140887802
2277668032
23147222550
24278556477
25526215993
26992694708
271870443330
283520594166
296620431857
3012439538938

[0,2,12,52,168,461,1133,2612,5759,12309,25666,
 52509,105803,210655,415349,812461,1578752,3050921,
 5868562,11244267,21472441,40887802,77668032,
 147222550,278556477,526215993,992694708,
 1870443330,3520594166,6620431857,12439538938]