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A120596 as a simple table

na(n)
01
11
210
3210
45505
5161601
65082420
7167451780
85705082795
9199354509755
107105393162010
11257312347583330
129440808323869455
13350189693739455535
1413110655796699158800
15494772468434359266960
1618801468275832345890970

[1,1,10,210,5505,161601,5082420,167451780,
 5705082795,199354509755,7105393162010,
 257312347583330,9440808323869455,
 350189693739455535,13110655796699158800,
 494772468434359266960,18801468275832345890970]