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A219412 as a simple table

na(n)
11
221
3181
41199
58173
657097
7398375
82773933
919314785
10134507787
11936720513
126523315045
1345428247915
14316361693953
152203138855813
1615342630706087
17106845881585421
18744073337324881
195181717103636911
2036085410931557557

[1,21,181,1199,8173,57097,398375,2773933,19314785,
 134507787,936720513,6523315045,45428247915,
 316361693953,2203138855813,15342630706087,
 106845881585421,744073337324881,5181717103636911,
 36085410931557557]