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A214785
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Numbers k such that k + 6 = A214783(k).
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3
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7, 13, 17, 53, 67, 97, 137, 157, 167, 193, 227, 257, 293, 313, 317, 383, 397, 457, 463, 503, 547, 577, 587, 593, 643, 653, 673, 683, 727, 757, 773, 823, 827, 883, 887, 937, 997, 1013, 1063, 1093, 1163, 1213, 1237
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OFFSET
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1,1
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COMMENTS
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This set is disjoint from A213784. Conjecture: all terms are prime.
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LINKS
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MAPLE
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f:= proc(n) local a, b, t, T, k;
b:= 0; a:= 1; T:= -3 mod n;
for k from 1 do
t:= a+b mod n;
if t = T then return k+1 fi;
a:= b; b:= t;
od
end proc:
f(1):= 1: f(3):= 1:
select(n -> f(n) = n+6, [$1..2000]); # Robert Israel, Jun 08 2023
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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