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A121686 as a simple table

na(n)
12
26
322
484
5324
61254
74862
818876
973372
10285532
111112412
124338536
1316938120
1466192390
15258909390
161013586540
173971224620
1815571021620
1961096813140
20239888764440
21942483155640
223705043827420
2314573172387852
2457351122857944

[2,6,22,84,324,1254,4862,18876,73372,285532,
 1112412,4338536,16938120,66192390,258909390,
 1013586540,3971224620,15571021620,61096813140,
 239888764440,942483155640,3705043827420,
 14573172387852,57351122857944]