OFFSET
1,2
COMMENTS
EXAMPLE
First nine rows:
1
3 1
6 4 1
10 11 4 1
15 25 12 4 1
21 51 31 12 4 1
28 97 73 32 12 4 1
36 172 162 79 32 12 4 1
45 309 345 185 80 32 12 4 1
T(3,1) counts these 6 subsets: {1,2}, {2,3}, {3,4}, {1,2,3}, {2,3,4}, {1,2,3,4};
T(3,2) counts these 4 subsets: {1,3}, {2,4}, {1,2,4}, {1,3,4};
T(3,3) = counts this subset: {1,4}.
MATHEMATICA
CROSSREFS
KEYWORD
AUTHOR
Clark Kimberling, Mar 08 2015
STATUS
approved