OFFSET
0,6
REFERENCES
J. Riordan, The blossoming of Schroeder's fourth problem, Acta Math., 137 (1976), 1-16.
LINKS
Sean A. Irvine, Java program (github)
EXAMPLE
Triangle begins:
1;
1,1;
1,1,3;
1,1,3,7;
...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
N. J. A. Sloane, Jan 01 2001
EXTENSIONS
More terms from Vladeta Jovovic, May 07 2005
STATUS
approved