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A087223 as a simple table

na(n)
01
12
25
314
436
596
6254
7676
81792
94756
1012621
1133490
1288868
13235818
14625764
151660510
164406296
1711692452
1831026836
1982332140
20218474784
21579739960
221538385398
234082226194
2410832507040
2528744906148
2676276860598
27202406625820

[1,2,5,14,36,96,254,676,1792,4756,12621,33490,
 88868,235818,625764,1660510,4406296,11692452,
 31026836,82332140,218474784,579739960,1538385398,
 4082226194,10832507040,28744906148,76276860598,
 202406625820]