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A149368 as a simple table

na(n)
01
11
24
312
445
5161
6651
72575
810768
944901
10193043
11833057
123653939
1316134813
1471923457
15322774583
161457954685
176622090289
1830234131093
19138642032594
20638494794892
212951054790813
2213687439364362
2363680571279683
24297128054833522
251390089493432837
266519295339621917
2730644944208215577

[1,1,4,12,45,161,651,2575,10768,44901,193043,
 833057,3653939,16134813,71923457,322774583,
 1457954685,6622090289,30234131093,138642032594,
 638494794892,2951054790813,13687439364362,
 63680571279683,297128054833522,1390089493432837,
 6519295339621917,30644944208215577]