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Search: id:A082215
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| A082215 |
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Palindromes obtained in the concatenation of terms starting with the first term of A018238. |
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+0
3
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| 1, 121, 1213121, 121312141213121, 1213121412131215121312141213121, 121312141213121512131214121312161213121412131215121312141213121, 1213121412131215121312141213121612131214121312151213121412131217121312141213121512131214121312161213121412131215121312141213121
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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Also called Zimin words.
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REFERENCES
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L. J. Cummings and M. Mays, A one-sided Zimin construction, Electron. J. Combin. 8 (2001), #R27
A. I. Zimin, Blocking sets of terms, Math. USSR Sbornik, 47 (1984), No. 2, 353-364.
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FORMULA
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The Zimin words are defined by Z_1 = 1, Z_n = Z_{n-1}nZ_{n-1} - Dmitry Kamenetsky (Dmitry.Kamenetsky(AT)rsise.anu.edu.au), Sep 30 2006
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CROSSREFS
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Cf. A018238, A123121.
See A001511 for another representation of this sequence of digits.
Sequence in context: A028463 A013749 A135825 this_sequence A123179 A136094 A053885
Adjacent sequences: A082212 A082213 A082214 this_sequence A082216 A082217 A082218
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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), Apr 08 2003
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EXTENSIONS
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More terms from Joshua Zucker (joshua.zucker(AT)stanfordalumni.org), May 08 2006
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