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A090331
Largest proper divisor of n that is also a prefix of n in binary.
4
1, 1, 2, 1, 3, 1, 4, 1, 5, 1, 6, 1, 7, 3, 8, 1, 9, 1, 10, 1, 11, 1, 12, 1, 13, 3, 14, 1, 15, 1, 16, 1, 17, 1, 18, 1, 19, 1, 20, 1, 21, 1, 22, 5, 23, 1, 24, 1, 25, 3, 26, 1, 27, 1, 28, 3, 29, 1, 30, 1, 31, 7, 32, 1, 33, 1, 34, 1, 35, 1, 36, 1, 37, 1, 38, 1, 39, 1, 40, 1, 41, 1, 42, 5, 43
OFFSET
2,3
COMMENTS
a(n) = 1 iff A090330(n) = 0;
a(A090332(n))=1; a(A090334(n))>1.
CROSSREFS
Sequence in context: A342703 A249068 A308073 * A338759 A229994 A165818
KEYWORD
nonn,base
AUTHOR
Reinhard Zumkeller, Nov 26 2003, corrected May 08 2004
EXTENSIONS
Edited by N. J. A. Sloane, Aug 19 2008 at the suggestion of Leroy Quet
STATUS
approved