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A050990
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2-Knodel numbers.
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9
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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
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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LINKS
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Table of n, a(n) for n=1..57.
Eric Weisstein's World of Mathematics, Knoedel Numbers.
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MAPLE
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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^(n-k) 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
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CROSSREFS
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Cf. A002997, A033553, A050992, A050993, A208154-A208158.
Sequence in context: A061344 A066664 A064938 * A225514 A161546 A167179
Adjacent sequences: A050987 A050988 A050989 * A050991 A050992 A050993
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KEYWORD
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nonn
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AUTHOR
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Eric W. Weisstein
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STATUS
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approved
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