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A307398 as a simple table

na(n)
01
11
24
313
452
5209
6906
74010
818303
985064
10402008
111924412
129314594
1345502924
14224068334
151111017056
165542331502
1727796367468
18140072333426
19708875098462
203601278993411
2118359296689521
2293892611212526
23481575492271765
242476572824391335
2512767331527712854

[1,1,4,13,52,209,906,4010,18303,85064,402008,
 1924412,9314594,45502924,224068334,1111017056,
 5542331502,27796367468,140072333426,708875098462,
 3601278993411,18359296689521,93892611212526,
 481575492271765,2476572824391335,
 12767331527712854]