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Search: id:A054263
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| A054263 |
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Number of palindromic triangular numbers with n digits. |
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+0
5
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| 3, 2, 3, 3, 2, 2, 6, 2, 1, 4, 7, 0, 4, 4, 12, 5, 6, 2, 3, 2, 6, 3, 6, 2, 2, 4, 3, 2, 5, 0, 3, 2, 1, 4, 3, 1, 10, 1, 4, 0
(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, Palindromic Triangulars
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EXAMPLE
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a(10) = 4 -> 1264114621,1634004361,5289009825,6172882716.
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CROSSREFS
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Cf. A000217, A003098, A008509, A008510.
Adjacent sequences: A054260 A054261 A054262 this_sequence A054264 A054265 A054266
Sequence in context: A134267 A092962 A112924 this_sequence A124874 A016459 A060585
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KEYWORD
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nonn,base,hard
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AUTHOR
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Patrick De Geest (pdg(AT)worldofnumbers.com), Apr 15 2000.
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