OFFSET
3,3
COMMENTS
The values a(n) are unknown for n>=9.
REFERENCES
V. I. Bolshakov, On spectrum of permanent on Lambda_n^k, Proc. of Seminar on Discrete Math. and Appl., Moscow State Univ. (1986), 65-73 (in Russian).
LINKS
V. S. Shevelev, Some problems of the theory of enumerating the permutations with restricted position, Journal of Soviet Mathematics, 61 (4) (1992) 2272-2317 (see pp. 2307-2309).
CROSSREFS
KEYWORD
nonn,bref,hard,more
AUTHOR
Vladimir Shevelev, Feb 19 2011
STATUS
approved