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%I #17 Feb 13 2021 01:09:10
%S 33,46,51,53,54,67,72,74,75,80,82,83,85,86,87,101,106,108,109,114,116,
%T 117,119,120,121,127,129,130,132,133,134,137,138,139,141,156,161,163,
%U 164,169,171,172,174,175,176,182,184,185,187,188,189,192,193,194,196
%N Numbers that have 4 terms in their Zeckendorf representation.
%C A007895(a(n)) = 4. - _Reinhard Zumkeller_, Mar 10 2013
%H Reinhard Zumkeller, <a href="/A179244/b179244.txt">Table of n, a(n) for n = 1..10000</a>
%e 33=21+8+3+1;
%e 46=34+8+3+1;
%e 51=34+13+3+1;
%e 53=34+13+5+1;
%e 54=34+13+5+2;
%p with(combinat): B := proc (n) local A, ct, m, j: A := proc (n) local i: for i while fibonacci(i) <= n do n-fibonacci(i) end do end proc: ct := 0: m := n: for j while 0 < A(m) do ct := ct+1: m := A(m) end do: ct+1 end proc: Q := {}: for i from fibonacci(9)-1 to 200 do if B(i) = 4 then Q := `union`(Q, {i}) else end if end do: Q;
%t zeck = DigitCount[Select[Range[2000], BitAnd[#, 2*#] == 0&], 2, 1];
%t Position[zeck, 4] // Flatten (* _Jean-François Alcover_, Jan 25 2018 *)
%o (Haskell)
%o a179244 n = a179244_list !! (n-1)
%o a179244_list = filter ((== 4) . a007895) [1..]
%o -- _Reinhard Zumkeller_, Mar 10 2013
%Y Cf. A035517, A007895, A111458, A135709, A179242 - A179253.
%K nonn
%O 1,1
%A _Emeric Deutsch_, Jul 05 2010
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