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A220326 as a simple table

na(n)
17
2174
34062
492093
52065264
646094354
71026529800
822841390408
9508110710307
1011302385499363
11251409042152240
125592331837970994
13124395540371693940
142767041352339397099

[7,174,4062,92093,2065264,46094354,1026529800,
 22841390408,508110710307,11302385499363,
 251409042152240,5592331837970994,
 124395540371693940,2767041352339397099]