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A199922
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Table read by rows, T(0,0) = 1 and for n>0, 0<=k<=3^(n-1) T(n,k) = gcd(k,3^(n-1)).
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1
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1, 1, 1, 3, 1, 1, 3, 9, 1, 1, 3, 1, 1, 3, 1, 1, 9, 27, 1, 1, 3, 1, 1, 3, 1, 1, 9, 1, 1, 3, 1, 1, 3, 1, 1, 9, 1, 1, 3, 1, 1, 3, 1, 1, 27, 81, 1, 1, 3, 1, 1, 3, 1, 1, 9, 1, 1, 3, 1, 1, 3, 1, 1, 9, 1, 1, 3, 1, 1, 3, 1, 1, 27, 1, 1, 3, 1, 1, 3, 1, 1, 9, 1, 1, 3, 1
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listen;
history;
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internal format)
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OFFSET
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0,4
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LINKS
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Table of n, a(n) for n=0..85.
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EXAMPLE
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1
1, 1
3, 1, 1, 3
9, 1, 1, 3, 1, 1, 3, 1, 1, 9
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MAPLE
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seq(print(seq(gcd(k, 3^(n-1)), k=0..3^(n-1))), n=0..4);
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CROSSREFS
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Cf. A198069.
Sequence in context: A132740 A106621 A011085 * A112508 A260883 A088749
Adjacent sequences: A199919 A199920 A199921 * A199923 A199924 A199925
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KEYWORD
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nonn,tabf
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AUTHOR
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Peter Luschny, Nov 12 2011
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STATUS
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approved
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