OFFSET
1,4
COMMENTS
The formula was listed in A174637 by Vladimir Shevelev. However, it produces a different sequence given here. Apparently, it is also related to permanents of (0,1)-matrices.
REFERENCES
V. S. Shevelev, On the permanent of the stochastic (0,1)-matrices with equal row sums, Izvestia Vuzov of the North-Caucasus region, Nature sciences 1 (1997), 21-38 (in Russian).
FORMULA
CROSSREFS
KEYWORD
nonn
AUTHOR
Max Alekseyev, Oct 21 2024
STATUS
approved