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A249930 as a simple table

na(n)
01
11
25
365
41020
517915
6336881
76634391
8135085305
92820748975
1060074608660
111299896748546
1228496343865808
13631545920570632
1414126673078922850
15318514279669755470
167231331734648562366
17165172699475903928921
183793005825337785580290
1987518313783310367308770

[1,1,5,65,1020,17915,336881,6634391,135085305,
 2820748975,60074608660,1299896748546,
 28496343865808,631545920570632,14126673078922850,
 318514279669755470,7231331734648562366,
 165172699475903928921,3793005825337785580290,
 87518313783310367308770]