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A278564 Irregular triangle read by rows: row n lists (negated) determinants of the quadratic Farey series of order n. 0

%I #12 Nov 25 2016 21:14:17

%S 1,1,3,1,1,2,3,2,1,1,2,3,1,5,1,3,2,1,1,2,2,3,2,5,2,3,2,2,1,1,2,2,3,1,

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

%U 2,2,2,3,1,4,2,5,2,3,1,1,9,1,1,3,2,5,2,4,1,3,1,1,1,1,1,2,2,2,2,3,1,4,2,1,6,2,3,2,1,9,1,2,3,2,6,1,1,2,4,1,3,2,2,2,2,1

%N Irregular triangle read by rows: row n lists (negated) determinants of the quadratic Farey series of order n.

%H H. Brown, K. Mahler, <a href="http://dx.doi.org/10.1016/0022-314X(71)90010-2">A generalization of Farey sequences: Some exploration via the computer</a>, Journal of Number Theory 3.3 (1971): 364-370.

%e Triangle begins:

%e 1,

%e 1,3,1,

%e 1,2,3,2,1,

%e 1,2,3,1,5,1,3,2,1,

%e 1,2,2,3,2,5,2,3,2,2,1,

%e 1,2,2,3,1,4,2,1,7,1,2,4,1,3,2,2,1,

%e 1,2,2,2,3,1,5,1,2,1,7,1,2,1,5,1,3,2,2,2,1,

%e 1,2,2,2,3,1,4,2,5,2,3,1,1,9,1,1,3,2,5,2,4,1,3,1,1,1,1,

%e 1,2,2,2,2,3,1,4,2,1,6,2,3,2,1,9,1,2,3,2,6,1,1,2,4,1,3,2,2,2,2,1,

%e ...

%K nonn,tabf

%O 2,3

%A _N. J. A. Sloane_, Nov 25 2016

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Last modified April 24 19:06 EDT 2024. Contains 371962 sequences. (Running on oeis4.)