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A056272 as a simple table

na(n)
01
11
22
35
415
552
6202
7855
83845
918002
1086472
11422005
122079475
1310306752
1451263942
15255514355
161275163905
176368612302
1831821472612
19159042661905
20795019337135
213974515030652
2219870830712482
2399348921288655

[1,1,2,5,15,52,202,855,3845,18002,86472,422005,
 2079475,10306752,51263942,255514355,1275163905,
 6368612302,31821472612,159042661905,795019337135,
 3974515030652,19870830712482,99348921288655]