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A055537 as a simple table

na(n)
37
464
5352
61485
75245
816290
945830
10119042
11289367
12664878
131455136
143051762
156163153
1612033700
1722792660
1841997387
1975463460
20132510654
21227803866
22384031745
23635752338
241034842530
251658130458
262617965384
274076707044

[7,64,352,1485,5245,16290,45830,119042,289367,
 664878,1455136,3051762,6163153,12033700,22792660,
 41997387,75463460,132510654,227803866,384031745,
 635752338,1034842530,1658130458,2617965384,
 4076707044]