A067783 - OEIS

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A067783

Numbers k such that prime(k+1)^2 == prime(k)^2 (mod k).

1, 2, 3, 4, 6, 8, 10, 12, 15, 16, 24, 30, 56, 92, 120, 144, 182, 336, 344, 348, 360, 376, 439, 1058, 1407, 4122, 5432, 7040, 7904, 9516, 17400, 23898, 25356, 29721, 33840, 40086, 40090, 40114, 40120, 44936, 53232, 63416, 85692, 93228, 100347, 112424, 159222

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OFFSET

1,2

LINKS

Michel Marcus, Table of n, a(n) for n = 1..57

PROG

(PARI) isok(k) = my(p=prime(k)); Mod(nextprime(p+1), k)^2 == Mod(p, k)^2; \\ Michel Marcus, Feb 17 2021

CROSSREFS

Sequence in context: A351740 A230374 A007183 * A062418 A056168 A054041

Adjacent sequences: A067780 A067781 A067782 * A067784 A067785 A067786

KEYWORD

nonn

AUTHOR

Benoit Cloitre, Feb 06 2002

EXTENSIONS

More terms from Michel Marcus, Feb 17 2021

STATUS

approved