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A343349 as a simple table

na(n)
01
11
25
321
495
5415
61851
78155
836030
9158510
10696502
113052966
1213359230
1358346206
14254405630
151107479694
164813850699
1720894227355
1890567536543
19392066476815
201695180397145
217320927664713
2231581573600685
23136094434672509
24585876330191950
252519701493092958

[1,1,5,21,95,415,1851,8155,36030,158510,696502,
 3052966,13359230,58346206,254405630,1107479694,
 4813850699,20894227355,90567536543,392066476815,
 1695180397145,7320927664713,31581573600685,
 136094434672509,585876330191950,2519701493092958]