

A050990


2Knodel numbers.


9



4, 6, 8, 10, 12, 14, 22, 24, 26, 30, 34, 38, 46, 56, 58, 62, 74, 82, 86, 94, 106, 118, 122, 132, 134, 142, 146, 158, 166, 178, 182, 194, 202, 206, 214, 218, 226, 254, 262, 274, 278, 298, 302, 314, 326, 334, 346, 358, 362, 382, 386, 394, 398, 422, 446, 454, 458
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OFFSET

1,1


LINKS

Table of n, a(n) for n=1..57.
Eric Weisstein's World of Mathematics, Knoedel Numbers.


MAPLE

with(numtheory);
knodel:=proc(i, k)
local a, n, ok;
for n from k+1 to i do
ok:=1;
for a from 1 to n do
if gcd(a, n)=1 then if (a^(nk) mod n)<>1 then ok:=0; break; fi; fi;
od;
if ok=1 then print(n); fi;
od;
end:
knodel(1000, 2) # Paolo P. Lava, Feb 24 2012


CROSSREFS

Cf. A002997, A033553, A050992, A050993, A208154A208158.
Sequence in context: A061344 A066664 A064938 * A225514 A161546 A231571
Adjacent sequences: A050987 A050988 A050989 * A050991 A050992 A050993


KEYWORD

nonn


AUTHOR

Eric W. Weisstein


STATUS

approved



