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A108627 as a simple table

na(n)
12
26
320
466
5222
6750
72536
88578
929018
1098166
11332092
121123458
133800630
1412857438
1543496400
16147147266
17497795634
181684030566
195697034596
2019272929986
2165199855118
22220569529934
23746181374904
242524313509762

[2,6,20,66,222,750,2536,8578,29018,98166,332092,
 1123458,3800630,12857438,43496400,147147266,
 497795634,1684030566,5697034596,19272929986,
 65199855118,220569529934,746181374904,
 2524313509762]