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A218516 as a simple table

na(n)
14
236
3236
41528
59858
663592
7410218
82646208
917069998
10110114102
11710317326
124582071648
1329557748082
14190669317026
151229957991200
167934137929012
1751181052626992
18330155610028966
192129747655406998
2013738446168804038

[4,36,236,1528,9858,63592,410218,2646208,17069998,
 110114102,710317326,4582071648,29557748082,
 190669317026,1229957991200,7934137929012,
 51181052626992,330155610028966,2129747655406998,
 13738446168804038]