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A373797 as a simple table

na(n)
11
21
31
43
53
64
74
86
96
108
118
1210
1310
1411
1511
1613
1713
1814
1914
2016
2116
2217
2317
2419
2519
2621
2722
2824
2924
3025
3125

[1,1,1,3,3,4,4,6,6,8,8,10,10,11,11,13,13,14,14,16,
 16,17,17,19,19,21,22,24,24,25,25]