A374187 - OEIS

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A374187

Least a of the form 4*n - 1 (n>=1) such that there is a positive integer k so that K(a / k) != K((-1)^floor(k/2)*k / a), where K denotes the Kronecker symbol (A372728).

3, 3, 7, 7, 7, 3, 3, 3, 11, 3, 7, 3, 3, 3, 7, 7, 3, 3, 3, 3, 7, 3, 7, 3, 3, 7, 3, 7, 7, 3, 3, 3, 7, 3, 3, 3, 3, 7, 7, 3, 3, 3, 3, 3, 7, 3, 7, 3, 3, 7, 11, 7, 3, 3, 3, 3, 7, 3, 7, 3, 3, 3, 11, 7, 3, 3, 3, 3, 7, 3, 3, 3, 7, 3, 7, 7, 3, 3, 3, 7, 3, 3, 3, 3, 7, 3

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

These values witness the correctness of A374189. They seem to grow very slowly.

LINKS

Table of n, a(n) for n=1..86.

CROSSREFS

Cf. A374189, A374188, A372728.

Sequence in context: A160515 A105670 A283996 * A003817 A092474 A225851

Adjacent sequences: A374184 A374185 A374186 * A374188 A374189 A374190

KEYWORD

nonn

AUTHOR

Peter Luschny, Jul 02 2024

STATUS

approved