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A049278 Smallest nonnegative value taken on by nx^2 - 19y^2 for an infinite number of integer pairs (x, y). 0
1, 2, 3, 1, 1, 5, 1, 8, 5, 10, 1, 12, 2, 2, 15, 4, 17, 18, 0, 1, 2, 3, 1, 5, 1, 5, 8, 1, 2, 5, 3, 13, 14, 2, 1, 5, 2, 19, 5, 21, 13, 23, 1, 1, 5, 2, 1, 21, 1, 29, 8, 8, 2, 11, 5, 8, 38, 26, 8, 29, 1, 11, 9, 5, 41, 5, 3, 17, 2, 21, 13, 53, 6, 55, 56, 0, 1, 2, 3, 4, 5, 6, 1, 8, 1, 10, 11, 12, 13 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..89.

CROSSREFS

Sequence in context: A002784 A276010 A166029 * A194680 A131739 A011151

Adjacent sequences:  A049275 A049276 A049277 * A049279 A049280 A049281

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified October 20 15:29 EDT 2019. Contains 328267 sequences. (Running on oeis4.)