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A053951 formatted as a simple table:

n a(n)
1 4
2 7744
3 47444544
4 47775744
5 57577744
6 4755757444
7 44547775545744
8 7557757477754457744
9 55744775754747577744 

[4,7744,47444544,47775744,57577744,4755757444,
 44547775545744,7557757477754457744,
 55744775754747577744]

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.

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