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A161199 as a simple table

na(n)
01
15
235
3105
41155
53003
615015
736465
8692835
91616615
107436429
1116900975
12152108775
13339319575
141502700975
153305942145
16115707975075
17251835004575
181091285019825
192354878200675
2020251952525805
2143397041126725
22185423721177825
23395033145117975

[1,5,35,105,1155,3003,15015,36465,692835,1616615,
 7436429,16900975,152108775,339319575,1502700975,
 3305942145,115707975075,251835004575,
 1091285019825,2354878200675,20251952525805,
 43397041126725,185423721177825,395033145117975]