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A180720 as a simple table

na(n)
01
11
22
37
453
51305
6177559
7247880897
89252468642944
939211218810149955871
10155393322265527728403643204013
1112102963126133848174768954972642433817636369

[1,1,2,7,53,1305,177559,247880897,9252468642944,
 39211218810149955871,
 155393322265527728403643204013,
 12102963126133848174768954972642433817636369]