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A174276 as a simple table

na(n)
01
12
26
330
470
5210
62310
710010
86006
9510510
10461890
119699690
1231870410
1374364290
14223092870
156469693230
166077590610
17200560490130
18200560490130
19494715875654
20674612557710
2160850052705442
22872184088778002
2313082761331670030

[1,2,6,30,70,210,2310,10010,6006,510510,461890,
 9699690,31870410,74364290,223092870,6469693230,
 6077590610,200560490130,200560490130,494715875654,
 674612557710,60850052705442,872184088778002,
 13082761331670030]