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A053891 formatted as a simple table:

n a(n)
1 1
2 4
3 144
4 441
5 1444
6 1411344
7 431434441
8 1441113444
9 11414343334144
10 134433311433444
11 4334114143334143111441
12 14431113411144114144433444 

[1,4,144,441,1444,1411344,431434441,1441113444,
 11414343334144,134433311433444,
 4334114143334143111441,
 14431113411144114144433444]

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Last modified December 4 15:11 EST 2009. Contains 170347 sequences.

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