OFFSET
1,18
COMMENTS
Row sums give A000088, n >= 1.
LINKS
FindStat - Combinatorial Statistic Finder, The Szeged index of a graph.
EXAMPLE
Triangle begins:
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,
1,1,1,1,2,1,1,0,1,2,2,0,0,1,1,2,5,1,2,2,2,0,0,0,2,0,0,0,1,1,0,0,0,0,0,0,1,
...
CROSSREFS
KEYWORD
nonn,tabf
AUTHOR
Christian Stump, Oct 15 2015
STATUS
approved