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A054263
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Number of palindromic triangular numbers with n digits.
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4
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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; refs; listen; history; internal format)
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OFFSET
| 1,1
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LINKS
| P. De Geest, Palindromic Triangulars
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EXAMPLE
| a(10) = 4 -> 1264114621,1634004361,5289009825,6172882716.
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CROSSREFS
| Cf. A000217, A003098, A008509, A008510.
Sequence in context: A112924 A153092 A165601 * A178775 A124874 A016459
Adjacent sequences: A054260 A054261 A054262 * A054264 A054265 A054266
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KEYWORD
| nonn,base,hard
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AUTHOR
| Patrick De Geest (pdg(AT)worldofnumbers.com), Apr 15 2000.
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