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A180278 as a simple table

na(n)
00
11
23
313
447
5447
62163
724263
8241727
92923783
1016485763
11169053487
124535472963
1336316463227
14879728844873
154476534430363
16119919330795347
171374445897718223
18106298577886531087

[0,1,3,13,47,447,2163,24263,241727,2923783,
 16485763,169053487,4535472963,36316463227,
 879728844873,4476534430363,119919330795347,
 1374445897718223,106298577886531087]