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A271389 as a simple table

na(n)
00
11
26
322
466
5179
6460
71148
82820
96869
1016658
1140306
1297414
13235303
14568216
151371960
163312392
177997033
1819306782
1946610958
20112529098
21271669595
22655868772
231583407668
243822684684
259228777661
2622280240682
2753789259754
28129858760974
29313506782543
30756872326960

[0,1,6,22,66,179,460,1148,2820,6869,16658,40306,
 97414,235303,568216,1371960,3312392,7997033,
 19306782,46610958,112529098,271669595,655868772,
 1583407668,3822684684,9228777661,22280240682,
 53789259754,129858760974,313506782543,
 756872326960]