|
|
A032750
|
|
Palindromic Super-2 Numbers.
|
|
1
|
|
|
131, 181, 333, 454, 919, 969, 1331, 1881, 3333, 6556, 9119, 9669, 10301, 10501, 10601, 10701, 13031, 13131, 13231, 13331, 13431, 13531, 13631, 13731, 13831, 13931, 14541, 16161, 16761, 18081, 18181, 18281, 18381, 18481, 18581, 18681
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
REFERENCES
|
C. A. Pickover, "Keys to Infinity", New York: Wiley, p. 7, 1995.
|
|
LINKS
|
|
|
MATHEMATICA
|
stpQ[n_]:=Module[{idn=IntegerDigits[n], id2=IntegerDigits[2n^2]}, MemberQ[ Partition[id2, 2, 1], {2, 2}]&&idn==Reverse[idn]]; Select[Range[20000], stpQ] (* Harvey P. Dale, Jan 16 2013 *)
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,base
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|