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A104807 Length of sections with distinct digits in the decimal expansion of Pi. 17

%I #14 May 18 2014 11:32:36

%S 3,5,2,4,3,5,3,2,6,2,5,4,1,6,7,2,10,5,5,4,4,5,2,4,6,2,6,5,7,1,5,2,3,4,

%T 3,7,2,2,1,7,5,7,1,3,1,4,3,4,3,3,6,3,7,4,2,5,4,4,4,7,4,3,5,4,5,5,5,4,

%U 6,2,5,6,5,5,2,2,2,4,2,4,1,6,4,2,2,7,5,7,4,1,2,2,3,5,5,7,5,3,2,1,6,5,5,3,3

%N Length of sections with distinct digits in the decimal expansion of Pi.

%C Start with decimal expansion of Pi: 3,1,4,1,5,9,2,6,5,3,5,8,9,7,9,3,2,3,8,4,6,2,6,4,3... Split the sequence into maximal sections with distinct digits: s={3,1,4},{1,5,9,2,6},{5,3},{5,8,9,7},{9,3,2},{3,8,4,6,2},{6,4,3},... Then a(n) = length[s(n)]: 3,5,2,4,3,5,3,... Sections with maximal length = 10 A104808.

%Y Cf. A104808, A000796.

%K nonn,base

%O 1,1

%A _Zak Seidov_, Mar 26 2005

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