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A000998 as a simple table

na(n)
01
13
26
311
424
569
6227
7753
82451
98004
1027138
1197806
12375313
131511868
146292884
1526826701
16116994453
17523646202
182414394601
1911487130362
2056341183365
21284110648983
221468690344087
237766823788295
2441976012524088
25231812530642644
261308325741771908

[1,3,6,11,24,69,227,753,2451,8004,27138,97806,
 375313,1511868,6292884,26826701,116994453,
 523646202,2414394601,11487130362,56341183365,
 284110648983,1468690344087,7766823788295,
 41976012524088,231812530642644,1308325741771908]