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Search: id:A068643
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| A068643 |
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Largest n-digit palindromic triangular number. If no such number exists then 0. |
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+0
4
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| 6, 66, 666, 8778, 66066, 828828, 6295926, 61477416, 178727871, 6172882716, 87350505378, 0, 68742000024786, 82078700787028, 684866959668486, 8208268228628028, 67898244444289876, 514816979979618415
(list; graph; listen)
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OFFSET
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1,1
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LINKS
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P. De Geest, Exhaustive list of Palindromic Triangulars
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EXAMPLE
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a(4) = 8778 = 132*133/2 and largest 4 digit palindrome. a(12) = 0 as no 12 digit palindromic triangular number exists.
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CROSSREFS
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Cf. A068641, A068642, A068644, A000217, A003098, A008509, A008510, A054263.
Sequence in context: A073549 A119087 A119212 this_sequence A119053 A119089 A036523
Adjacent sequences: A068640 A068641 A068642 this_sequence A068644 A068645 A068646
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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), Feb 28 2002
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EXTENSIONS
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Edited by Patrick De Geest (pdg(AT)worldofnumbers.com), Mar 24 2002.
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