OFFSET
0,2
COMMENTS
The DENEAT operator is also known as the Sisyphus function.
On the other hand, the sequence of numbers k such that DENEAT(k) is a multiple of k, is the finite sequence {1, 11, 14, 16, 22, 56, 123}.
REFERENCES
J. Schram, The Sisyphus string, J. Rec. Math., 19:1 (1987), 43-44.
LINKS
Paolo P. Lava, Table of n, a(n) for n = 0..1000
EXAMPLE
2912 / DENEAT(2912) = 2912 / 224 = 13.
MAPLE
P:=proc(n) local a, b, c, d, k; a:=convert(n, base, 10); b:=0: c:=0:
for k from 1 to nops(a) do if a[k] mod 2=0 then b:=b+1; else c:=c+1; fi;
od: d:=b*10^length(c)+c; a:=n/(d*10^length(length(n))+length(n)):
if frac(a)=0 then n; fi; end: 0, seq(P(i), i=1..6204);
CROSSREFS
KEYWORD
nonn,base,easy
AUTHOR
Paolo P. Lava, May 14 2019
STATUS
approved