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A018238 as a simple table

na(n)
11
221
33121
441213121
55121312141213121
661213121412131215121312141213121
77121312141213121512131214121312161213121412131215121312141213121

[1,21,3121,41213121,5121312141213121,
 61213121412131215121312141213121,
 71213121412131215121312141213121612131214121312151\
 21312141213121]