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A124531 as a simple table

na(n)
01
11
22
35
416
562
6274
71332
86978
938873
10228090
111399625
128933506
1359066261
14403241292
152835267821
1620490128048
17151951503074
181154770194362
198983396031267
2071473650532630
21581142591346325
224825842125683150

[1,1,2,5,16,62,274,1332,6978,38873,228090,1399625,
 8933506,59066261,403241292,2835267821,20490128048,
 151951503074,1154770194362,8983396031267,
 71473650532630,581142591346325,4825842125683150]