Find out the wrong number in the given following sequence.
4 5 9 29 111 556 3335
$$(4\times1)+1 = 5$$
$$(5\times2)-1 = 9$$
$$(9\times3)+1 = 28$$
$$(28\times4)-1 = 111$$
$$(111\times5)+1 = 556$$
$$(556\times6)-1 = 3335$$
$$\therefore$$The incorrect number is 29.
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