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A203643 as a simple table

na(n)
11
22
35
415
552
6203
7877
84140
921147
10115975
11678570
124213597
1327644437
14190899321
151382958439
1610480136006
1782864611947
18682068020031
195832484170844
2051717380273487
21474706578749477
224503047451718545
2344074082550176545

[1,2,5,15,52,203,877,4140,21147,115975,678570,
 4213597,27644437,190899321,1382958439,10480136006,
 82864611947,682068020031,5832484170844,
 51717380273487,474706578749477,4503047451718545,
 44074082550176545]