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A053897 as a simple table

n a(n)
1 1
2 4
3 144
4 441
5 1444
6 115111441
7 1551414544
8 441411414544
9 115414455444544
10 41155551514151451441
11 114515541511151545444
12 5115115541555411411554441
13 5411144145154411455544144144

[1,4,144,441,1444,115111441,1551414544,
 441411414544,115414455444544,41155551514151451441,
 114515541511151545444,5115115541555411411554441,
 5411144145154411455544144144]

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Last modified May 3 14:21 EDT 2024. Contains 372212 sequences. (Running on oeis4.)