A117864
formatted as a simple table:
n
a(n)
1
4
2
8
3
28
4
48
5
148
6
248
7
748
8
1248
9
3748
10
6248
[4,8,28,48,148,248,748,1248,3748,6248]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified November 27 22:38 EST 2009. Contains 167602 sequences.
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