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A035747 as a simple table

na(n)
01
1200
26800
397880
4822560
54780008
621278640
777548920
8242080320
9668274440
101669752016
113842321560
128251811680
1316711687720
1432179616240
1559307908024
16105189061760
17180344446280
18300011499280
19485792684760
20767737840032
211186940456040
221798737871920

[1,200,6800,97880,822560,4780008,21278640,
 77548920,242080320,668274440,1669752016,
 3842321560,8251811680,16711687720,32179616240,
 59307908024,105189061760,180344446280,
 300011499280,485792684760,767737840032,
 1186940456040,1798737871920]