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Search: id:A110745
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| A110745 |
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a(n) is a number such that if odd positioned digits are deleted one gets n and if even positioned digits are deleted one gets n reversed. Counting is from the LSB side. The position of LSB is one. |
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+0
1
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| 11, 22, 33, 44, 55, 66, 77, 88, 99, 1001, 1111, 1221, 1331, 1441, 1551, 1661, 1771, 1881, 1991, 2002, 2112, 2222, 2332, 2442, 2552, 2662, 2772, 2882, 2992, 3003, 3113, 3223, 3333, 3443, 3553, 3663, 3773, 3883, 3993, 4004, 4114, 4224, 4334, 4444, 4554
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Except for initial 0, rearrangement of numbers in A056524. They first differ at a(101) = 110011, while A056524(101) = 101101. If n has digits d_1 d_2 ... d_k, permute them to d_1 d_k d_2 d_{k-1} ... d_{floor(k/2)+1} and use that as index to A056524. - Frank Adams-Watters (FrankTAW(AT)Netscape.net), Jun 20 2006
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EXAMPLE
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a(12) = 1221, deleting the LSB and the third digit 2 we get 12, deleting second and fourth digit we get 21.
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CROSSREFS
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Cf. A045918.
Sequence in context: A068900 A083852 A056524 this_sequence A020338 A052191 A110732
Adjacent sequences: A110742 A110743 A110744 this_sequence A110746 A110747 A110748
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KEYWORD
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base,nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Aug 10 2005
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EXTENSIONS
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More terms from Frank Adams-Watters (FrankTAW(AT)Netscape.net), Jun 20 2006
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