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A176956 as a simple table

na(n)
01
13
23
311
435
5139
6547
72251
89379
939819
10171171
11744651
123271203
1314494859
1464707875
15290773707
161314227619
175970720651
1827251241891
19124895810251
20574563563299
212652205841547
2212280754200611
2357026615362763

[1,3,3,11,35,139,547,2251,9379,39819,171171,
 744651,3271203,14494859,64707875,290773707,
 1314227619,5970720651,27251241891,124895810251,
 574563563299,2652205841547,12280754200611,
 57026615362763]