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Arithmetic mean of largest subset of {A063676(1), ......., A063676(n-1)} such that a(n) is an integer and a(n) is maximal.
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%I #3 Mar 30 2012 18:50:18

%S 1,2,3,4,5,8,9,13,16,16,28,34,44,51,67,89,96,125,156,175,212,212,331,

%T 377,438,510,626,737,900,1020,1238,1392,1472,1847,1847,2488,2836,3476,

%U 4000,4443,5289,6073,6779,7977,9130,10435,10408,13269,15091,17095

%N Arithmetic mean of largest subset of {A063676(1), ......., A063676(n-1)} such that a(n) is an integer and a(n) is maximal.

%C a(n) = A063676(n+1) - A063676(n) (by definition)

%e The arithmetic mean of the first 7 A063676-elements is (1 + 2 + 4 + 7 + 11 + 16 + 24) / 7 = 65 / 7 which is not an integer; but skipping A063676(5) = 11 yields a(7) = 54 / 6 = 9.

%Y A063676.

%K nonn

%O 1,2

%A _Reinhard Zumkeller_, Jul 28 2001