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A155116 as a simple table

na(n)
01
12
28
330
4114
5432
61638
76210
823544
989262
10338418
111283040
124864374
1318442242
1469919848
15265086270
161005018354
173810313872
1814445996678
1954768931650
20207644784984
21787241149902
222984657804658
2311315696863680
2442901064005014

[1,2,8,30,114,432,1638,6210,23544,89262,338418,
 1283040,4864374,18442242,69919848,265086270,
 1005018354,3810313872,14445996678,54768931650,
 207644784984,787241149902,2984657804658,
 11315696863680,42901064005014]