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A334250 as a simple table

na(n)
01
11
22
34
412
535
6129
7567
82920
916110
10103467
11717608
125748214
1347937957
14441139750
154319093093
1645963368076

[1,1,2,4,12,35,129,567,2920,16110,103467,717608,
 5748214,47937957,441139750,4319093093,45963368076]