OFFSET
1,4
REFERENCES
L. Comtet, Advanced Combinatorics, Reidel, 1974, p. 83, Problem 25.
EXAMPLE
1/1;
1/2, 1/2;
1/3, 1/6, 1/3;
1/4, 1/12, 1/12, 1/4;
1/5, 1/20, 1/30, 1/20, 1/5; ...
CROSSREFS
KEYWORD
tabf,nonn,easy,less
AUTHOR
EXTENSIONS
More terms from Gregory D Johnson (gjohn(AT)iname.com)
Edited by M. F. Hasler, Apr 05 2015
STATUS
approved