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A263338 Triangle read by rows: T(n,k) is the number of graphs with n vertices and Szeget index k. 0

%I #13 Oct 16 2015 03:35:46

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

%T 2,2,0,0,1,1,2,5,1,2,2,2,0,0,0,2,0,0,0,1,1,0,0,0,0,0,0,1,1,1,1,2,2,1,

%U 2,2,2,3,4,1,0,1,1,3,5,2,2,3,2,1,2,2,6,6,2,5,7,10,5,5,2,6,6,3,2,2

%N Triangle read by rows: T(n,k) is the number of graphs with n vertices and Szeget index k.

%C Row sums give A000088, n >= 1.

%H FindStat - Combinatorial Statistic Finder, <a href="http://www.findstat.org/StatisticsDatabase/St000263">The Szeged index of a graph</a>.

%e Triangle begins:

%e 1,

%e 1,1,

%e 1,1,0,1,1,

%e 1,1,1,1,1,0,1,0,1,2,1,0,0,0,0,0,1,

%e 1,1,1,1,2,1,1,0,1,2,2,0,0,1,1,2,5,1,2,2,2,0,0,0,2,0,0,0,1,1,0,0,0,0,0,0,1,

%e ...

%Y Cf. A000088.

%K nonn,tabf

%O 1,18

%A _Christian Stump_, Oct 15 2015

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Last modified April 24 22:17 EDT 2024. Contains 371964 sequences. (Running on oeis4.)