OFFSET
2,1
LINKS
T. M. Cover, The number of linearly inducible orderings of points in d-space, SIAM J. Applied Math., 15 (1967), 434-439.
FORMULA
See A071223, which is the main entry for this array.
EXAMPLE
Array begins
2 2 2 2 2 ...
2 6 6 6 6 ...
2 12 24 24 24 ...
2 20 72 120 120 ...
2 30 172 480 720 ...
...
MAPLE
A071223 := proc(n, k)
if k=1 and n>=2 then
2
elif n=2 and k>=1 then
2
elif k>=n-1 then
n!
else
procname(n-1, k)+(n-1)*procname(n-1, k-1)
fi ;
end proc:
for d from 3 to 16 do
for k from 1 to d-2 do
n := d-k ;
printf("%d, ", A071223(n, k)) ;
end do:
end do; # R. J. Mathar, Oct 31 2011
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
N. J. A. Sloane, Oct 30 2011
STATUS
approved