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A028568
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Palindromes of the form k*(k+8).
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1
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0, 9, 33, 4884, 8448, 9009, 31313, 48384, 52425, 82928, 88788, 489984, 505505, 861168, 5013105, 8020208, 48999984, 88322388, 801909108, 902101209, 3305445033, 4899999984, 8807447088, 35565056553, 52065656025, 58129692185, 80532223508, 88892229888, 357468864753
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OFFSET
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1,2
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COMMENTS
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For i >= 0, 48(99)^{2*i}84 is a term arising from k = 69^i6, where ^ is repeated concatenation. - Michael S. Branicky, Jan 30 2022
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LINKS
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FORMULA
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MATHEMATICA
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Select[Table[k(k+8), {k, 0, 600000}], PalindromeQ] (* Harvey P. Dale, Jun 24 2023 *)
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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