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A123491 as a simple table

na(n)
01
12
25
310
422
548
6112
7274
8715
91982
105837
1118180
1259644
13205296
14739032
152775180
1610846965
1744039754
18185391469
19807776198
203637193474
2116900721824
2280939650552
23399061251246
242023408865983
2510540656630118

[1,2,5,10,22,48,112,274,715,1982,5837,18180,59644,
 205296,739032,2775180,10846965,44039754,185391469,
 807776198,3637193474,16900721824,80939650552,
 399061251246,2023408865983,10540656630118]