Distribution of seats in the European Parliament postulated by the Treaty of Lisbon should be degressively proportional. We propose a numerical method which determines uniquely a distribution of seats in the European Parliament which fulfil the requirements of degressive proportionality. More generally, let l _i, 1≤i≤n, be any non-increasing sequence of real positive numbers. We say that a sequence of positive integers m _i is degressively proportional with respect to the sequence l _i, if m _i and limi are non-increasing sequences. For fixed positive integer M we determine inductively a sequence M _i degressively proportional with respect to l _i which is smaller, then any other such sequence with the first element ≥M. Moreover, for every integer ∑i=1nMi≤Y≤nM we determine a degressively proportional sequence m _i with respect to l _i, which has the first element m _1=M and satisfies inequalities Y-(n-2)≤∑i=1nmi≤Y.
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