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A226638 as a simple table

na(n)
00
11
26
320
484
5319
61260
74901
819176
974860
10292494
111142459
124462920
1317433181
1468099226
15266014100
161039126224
174059116419
1815856045380
1961938144041
20241947712356
21945115407340
223691885043874
2314421535219799
2456334548849040
25220058498917081

[0,1,6,20,84,319,1260,4901,19176,74860,292494,
 1142459,4462920,17433181,68099226,266014100,
 1039126224,4059116419,15856045380,61938144041,
 241947712356,945115407340,3691885043874,
 14421535219799,56334548849040,220058498917081]