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A087977 as a simple table

na(n)
1210
27314
337960
4134043
5357642
61217250
71217250
814273478
944939642
1076067298
11163459742
12547163235
132081479430
142771263512
1511715712410
1617911205580
1756608713884
18118968284928
19118968284928
20585927201062

[210,7314,37960,134043,357642,1217250,1217250,
 14273478,44939642,76067298,163459742,547163235,
 2081479430,2771263512,11715712410,17911205580,
 56608713884,118968284928,118968284928,
 585927201062]