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A018183 as a simple table

na(n)
01
11
23
36
412
524
645
785
8161
9305
10576
111087
122053
133877
147321
1513824
1626102
1749285
1893059
19175712
20331776
21626451
221182849
232233426
244217100
257962624
2615034827
2728388386
2853602241
29101210414
30191102976

[1,1,3,6,12,24,45,85,161,305,576,1087,2053,3877,
 7321,13824,26102,49285,93059,175712,331776,626451,
 1182849,2233426,4217100,7962624,15034827,28388386,
 53602241,101210414,191102976]