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A049257 Smallest nonnegative value taken on by 18x^2 - ny^2 for an infinite number of integer pairs (x, y). 0
2, 0, 6, 2, 13, 12, 2, 0, 9, 2, 7, 6, 2, 4, 3, 2, 1, 0, 18, 18, 18, 18, 1, 18, 2, 18, 18, 2, 18, 18, 2, 0, 18, 2, 7, 18, 2, 10, 6, 2, 18, 18, 18, 18, 18, 2, 1, 18, 2, 0, 18, 2, 18, 18, 2, 16, 15, 2, 13, 12, 2, 4, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, 18, 18, 18, 18, 18, 18, 2, 18, 18, 2, 13, 18 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..84.

CROSSREFS

Sequence in context: A196072 A261883 A294779 * A054877 A269795 A095834

Adjacent sequences:  A049254 A049255 A049256 * A049258 A049259 A049260

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified March 21 21:34 EDT 2019. Contains 321382 sequences. (Running on oeis4.)