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A203642 as a simple table

na(n)
11
22
35
415
552
6203
7877
84140
921147
10115975
11678570
124213597
1327644436
14190899230
151382953889
1610479970386
1782859701769
18681942165393
195829591731684
2051656311613107
21473501669531146
224480550589850064
2343672799989835155

[1,2,5,15,52,203,877,4140,21147,115975,678570,
 4213597,27644436,190899230,1382953889,10479970386,
 82859701769,681942165393,5829591731684,
 51656311613107,473501669531146,4480550589850064,
 43672799989835155]