|
Search: id:A087830
|
|
|
| A087830 |
|
Consecutive repeats in A087831, the triple recursion skip two Hofstadter Q of the second sort. |
|
+0
1
|
|
| 1, 2, 3, 4, 5, 7, 10, 14, 15, 19, 20, 26, 27, 30, 31, 33, 34, 37, 41, 44, 47, 55, 62, 64, 66, 70, 74, 75, 84, 86, 87, 90, 93, 94, 96, 101, 111, 112, 116, 119, 122, 123, 129, 130, 140, 142, 145, 148, 157, 158, 163, 166, 172, 174, 178, 179, 181, 193, 199, 203, 224, 225
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
MATHEMATICA
|
Hofstadter14[n_Integer?Positive] := Hofstadter14[n] = Hofstadter14[Abs[n - Hofstadter14[n-1]]] + Hofstadter14[ Hofstadter14[Abs[n - Hofstadter14[n-4]]]] Hofstadter14[0] = Hofstadter14[1] = Hofstadter14[2]= Hofstadter14[3]= Hofstadter14[4]= 1 digits=3000 ta=Table[Hofstadter14[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
|
Cf. A005206.
Sequence in context: A018127 A017835 A007601 this_sequence A039857 A017836 A017898
Adjacent sequences: A087827 A087828 A087829 this_sequence A087831 A087832 A087833
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Roger L. Bagula (rlbagulatftn(AT)yahoo.com), Oct 06 2003
|
|
|
Search completed in 0.002 seconds
|
