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A180021 Second differences of sequence A180005. 0

%I

%S 3,1,3,0,2,1,2,2,0,3,0,2,2,1,1,2,1,2,1,2,1,2,1,1,2,1,2,1,2,1,1,2,1,2,

%T 2,0,2,2,1,2,0,3,1,1,2,1,1,2,2,1,1,2,1,2,1,2,1,1,2,1,2,1,2,1,2,1,1,2,

%U 1,2,1,2,1,1,2,2,1,1,2,1,2,1,1,2,2,0,3,0,3,0,2,2,1,1,2,1,2,1,2,1,1,2,2,0,3

%N Second differences of sequence A180005.

%C It is conjectured that this sequence is bounded between 0 and 3.

%H P. Diaconis and F. Mosteller, <a href="https://www.stat.berkeley.edu/~aldous/157/Papers/diaconis_mosteller.pdf">Methods of studying coincidences</a>, J. Amer. Statist. Assoc. 84 (1989), pp. 853-861.

%Y Cf. A180005.

%K nonn

%O 3,1

%A Mario O. Bourgoin (mob(AT)brandeis.edu), Aug 06 2010

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Last modified April 14 05:00 EDT 2021. Contains 342941 sequences. (Running on oeis4.)