OFFSET
1,3
LINKS
Thomas M. Richardson, The three 'R's and Dual Riordan Arrays, arXiv:1609.01193 [math.CO], 2016.
EXAMPLE
1/1;
1/1 1/1; --> 1
1/1 1/2 1/1; --> 1
1/1 3/2 3/2 1/1; --> 3 1
1/1 5/2 3/1 5/2 1/1; --> 5 1
1/1 7/2 11/2 11/2 7/2 1/1; --> 11 7 1
1/1 9/2 9/1 11/1 9/1 9/2 1/1; --> 9 9 1
1/1 11/2 27/2 20/1 20/1 27/2 11/2 1/1; --> 20 27 11 1
CROSSREFS
KEYWORD
tabf,nonn,less
AUTHOR
EXTENSIONS
More terms from Sean A. Irvine, Apr 13 2021
STATUS
approved