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A098703 as a simple table

na(n)
00
11
22
36
417
550
6148
7441
81318
93946
1011825
1135454
12106328
13318929
14956698
152869950
168609617
1725828474
1877484812
19232453449
20697358750
212092073666
226276216817
2318828643686
2456485920112
25169457742625
26508373199218
271525119551286

[0,1,2,6,17,50,148,441,1318,3946,11825,35454,
 106328,318929,956698,2869950,8609617,25828474,
 77484812,232453449,697358750,2092073666,
 6276216817,18828643686,56485920112,169457742625,
 508373199218,1525119551286]