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A037638 as a simple table

na(n)
12
221
3213
42132
521321
6213213
72132132
821321321
9213213213
102132132132
1121321321321
12213213213213
132132132132132
1421321321321321
15213213213213213
162132132132132132

[2,21,213,2132,21321,213213,2132132,21321321,
 213213213,2132132132,21321321321,213213213213,
 2132132132132,21321321321321,213213213213213,
 2132132132132132]