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A337223
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a(n) is the least number that can be obtained by replacing some cube XXX in the binary expansion of n by X.
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3
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0, 1, 2, 3, 4, 5, 6, 1, 2, 9, 10, 11, 12, 13, 2, 3, 4, 5, 18, 19, 20, 21, 22, 5, 6, 25, 26, 27, 4, 5, 6, 7, 8, 9, 10, 11, 36, 37, 38, 9, 10, 41, 2, 43, 44, 45, 10, 11, 12, 13, 50, 51, 52, 53, 54, 13, 8, 9, 10, 11, 12, 13, 14, 3, 4, 17, 18, 19, 20, 21, 22, 17
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listen;
history;
text;
internal format)
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OFFSET
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0,3
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COMMENTS
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Leading zeros in binary expansions are ignored.
Fixed points correspond to A286262.
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LINKS
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FORMULA
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EXAMPLE
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The first terms, in decimal and in binary, are:
n a(n) bin(n) bin(a(n))
-- ---- ------ ---------
0 0 0 0
1 1 1 1
2 2 10 10
3 3 11 11
4 4 100 100
5 5 101 101
6 6 110 110
7 1 111 1
8 2 1000 10
9 9 1001 1001
10 10 1010 1010
11 11 1011 1011
12 12 1100 1100
13 13 1101 1101
14 2 1110 10
15 3 1111 11
16 4 10000 100
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PROG
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(PARI) See Links section.
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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STATUS
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approved
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