OFFSET
1,1
COMMENTS
In the definition bcd means concatenation not multiplication. - Sean A. Irvine, Oct 18 2018
REFERENCES
W. Bruns and J. Herzog, Cohen-Macaulay Rings, Cambridge, 1993, p. 158.
MAPLE
invA000292 := proc(n)
local i;
for i from 1 do
if binomial(i+1, 3) > n then
return i;
end if;
end do:
end proc:
invA000217 := proc(n)
local i;
for i from 1 do
if binomial(i+1, 2) > n then
return i;
end if;
end do:
end proc:
A014369 := proc(n)
local b, c, d ;
b := invA000292(n) ;
c := invA000217(n-binomial(b, 3)) ;
d := n-binomial(b, 3)-binomial(c, 2) ;
digcatL([b, c, d]) ; # of program transforms
end proc:
seq(A014369(n), n=1..70) ; # R. J. Mathar, May 25 2023
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
EXTENSIONS
a(1), a(4), a(10), a(20), a(35) modified to meet constraint b>c>d and more terms from Sean A. Irvine, Oct 18 2018
STATUS
approved