A058460
formatted as a simple table:
n
a(n)
1
4
2
7744
3
7744424444247727742724
4
2222747424244722424422447477474724
[4,7744,7744424444247727742724, 2222747424244722424422447477474724]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
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Last modified December 16 17:18 EST 2009. Contains 170825 sequences.
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