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A120589 as a simple table

na(n)
01
12
23
36
415
542
6126
7396
81287
94290
1014586
1150388
12176358
13624036
142228700
158023320
1629084535
17106073010
18388934370
191432916100
205301789570
2119692361260
2273398801060
23274447690920
241029178840950
253869712441972
2614585839204356

[1,2,3,6,15,42,126,396,1287,4290,14586,50388,
 176358,624036,2228700,8023320,29084535,106073010,
 388934370,1432916100,5301789570,19692361260,
 73398801060,274447690920,1029178840950,
 3869712441972,14585839204356]