OFFSET
2,2
COMMENTS
It appears that table 2 of the Williamson article contains typographical errors and the sequence was intended to read as in A210699.
LINKS
Williamson, S. G. The combinatorial analysis of patterns and the principle of inclusion-exclusion. Discrete Math. 1 (1972), no. 4, 357--388. MR0299493 (45 #8541)
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Mar 25 2012
STATUS
approved