OFFSET
2,3
LINKS
FORMULA
T(n,n-1) = A000088(n-1).
T(n,2) = 2 for n>2 as the only possibilities are a cycle graph or a path graph.
EXAMPLE
Triangle starts
1;
0, 2;
0, 2, 4;
0, 2, 8, 11;
0, 2, 27, 49, 34;
0, 2, 62, 289, 344, 156;
0, 2, 192, 1735, 4457, 3687, 1044;
0, 2,...
CROSSREFS
KEYWORD
AUTHOR
Henry Bottomley, Feb 22 2020
EXTENSIONS
a(32)-a(48) from Chai Wah Wu, Sep 08 2020
STATUS
approved