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A209068 as a simple table

na(n)
11
24
312
457
5276
61465
78008
845408
9263168
101554582
119318412
1256549840
13346717662
142144555617
1513365472929
1683848948043
17529091046781
183355802952070

[1,4,12,57,276,1465,8008,45408,263168,1554582,
 9318412,56549840,346717662,2144555617,13365472929,
 83848948043,529091046781,3355802952070]