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A317958 as a simple table

na(n)
012
112212
212212112212
312212112212112212112212
412212112212112212112212212212112212112212112212
512212112212112212112212212212112212112212112212112212112212112212112212212212112212112212112212

[12,12212,12212112212,12212112212112212112212,
 12212112212112212112212212212112212112212112212,
 12212112212112212112212212212112212112212112212112\
 212112212112212112212212212112212112212112212]