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A376069 as a simple table

na(n)
11
2121
3123121321
4123412314231243121342132413214321
5123451234152341253412354123145213425134215342135421345214352145321452314253142351423154231245312435124315243125432154325143254132451324153241352413254312

[1,121,123121321,
 123412314231243121342132413214321,
 12345123415234125341235412314521342513421534213542\
 13452143521453214523142531423514231542312453124351\
 24315243125432154325143254132451324153241352413254\
 312]