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A028558 Numbers n such that n(n+5) is a palindrome. 0
0, 1, 6, 18, 24, 202, 203, 814, 2067, 2178, 2207, 20402, 25116, 64493, 82566, 207067, 2040402, 2187142, 2233097, 6887078 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..20.

P. De Geest, Palindromic Quasipronics of the form n(n+x)

Erich Friedman, What's Special About This Number? (See entries 814, 2067.)

CROSSREFS

Sequence in context: A051395 A256266 A228104 * A140450 A157800 A225110

Adjacent sequences:  A028555 A028556 A028557 * A028559 A028560 A028561

KEYWORD

nonn,base

AUTHOR

Patrick De Geest

STATUS

approved

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Last modified January 24 03:35 EST 2018. Contains 298115 sequences.