Răspuns :
1; 4; 8; 13; 19; 26; 34 .....
4 = 1 + 3
8 = 4 + 4
13 = 8 + 5
19 = 13 + 6
26 = 19 + 7
34 = 26 + 8
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4 = 1 + 3
8 = 4 + 4
13 = 8 + 5
19 = 13 + 6
26 = 19 + 7
34 = 26 + 8
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