OFFSET
1,1
COMMENTS
A007895(a(n)) = 7. - Reinhard Zumkeller, Mar 10 2013
LINKS
Reinhard Zumkeller, Table of n, a(n) for n = 1..10000
EXAMPLE
609 = 377+144+55+21+8+3+1;
842 = 610+144+55+21+8+3+1;
931 = 610+233+55+21+8+3+1;
965 = 610+233+89+21+8+3+1;
978 = 610+233+89+34+8+3+1.
MAPLE
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(15)-1 to 2100 do if B(i) = 7 then Q := `union`(Q, {i}) else end if end do: Q;
MATHEMATICA
zeck = DigitCount[Select[Range[4*10^4], BitAnd[#, 2*#] == 0 &], 2, 1];
Position[zeck, 7] // Flatten (* Jean-François Alcover, Jan 30 2018 *)
PROG
(Haskell)
a179247 n = a179247_list !! (n-1)
a179247_list = filter ((== 7) . a007895) [1..]
-- Reinhard Zumkeller, Mar 10 2013
CROSSREFS
KEYWORD
nonn
AUTHOR
Emeric Deutsch, Jul 05 2010
STATUS
approved