Ciąg 1:

$1,\frac{1}{2},3,\frac{1}{4},5,\frac{1}{6},7,\frac{1}{8},9,\frac{1}{10},\dots$  

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Ciąg 2:

$1,2,2,3,3,3,4,4,4,4,5,5,5,5,\dots$  

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Ciąg 3:

$-1,-2,3,4,-5,-6,7,8,-9,-10,11,\dots$  

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Ciąg 4:

$\sqrt{2},\sqrt{3},\sqrt{5},\sqrt{6},\sqrt{7},\sqrt{8},\sqrt{10},\sqrt{11},\sqrt{12},\sqrt{13},\sqrt{14},\sqrt{15},\sqrt{17},\dots$