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A291007 as a simple table

na(n)
01
13
29
327
481
5242
6720
72137
86337
918789
1055715
11165232
12490058
131453493
144311025
1512786359
1637923789
17112480082
18333610072
19989469949
202934716101
218704215281
2225816251319
2376569665176
24227101665034
25673571786617
261997779058053
275925309279179

[1,3,9,27,81,242,720,2137,6337,18789,55715,165232,
 490058,1453493,4311025,12786359,37923789,
 112480082,333610072,989469949,2934716101,
 8704215281,25816251319,76569665176,227101665034,
 673571786617,1997779058053,5925309279179]