|
|
|
|
1, 1, 13, 15, 25, 39, 47, 51, 69, 81, 101, 139, 249, 261, 275, 291, 739, 1243, 2243
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,3
|
|
LINKS
|
|
|
MATHEMATICA
|
Hofstadter123[n_Integer?Positive] := Hofstadter123[n] = Hofstadter123[Abs[n - Hofstadter123[n-1]]] + Hofstadter123[Abs[n - Hofstadter123[n-2]]]+ Hofstadter123[Abs[n - Hofstadter123[n-3]]] Hofstadter123[0] =Hofstadter123[1] = Hofstadter123[2]= Hofstadter123[3]= 1 digits=30000 ta=Table[Hofstadter123[n], {n, 1, digits}]; b=Table[If[ta[[n]]-ta[[n-1]]==0, ta[[n]], 0], {n, 2, digits}]; c=Delete[Union[b], 1]
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|