|
| |
|
|
A053889
|
|
Squares composed of digits {1,2,9}.
|
|
2
| |
|
|
1, 9, 121, 29929, 9991921, 1212919929, 1929229929, 1991212129, 2929299129, 1229129212921, 92222199291121, 219992999929921, 99221129991291219129, 2291192212129911919221121, 9992221299191112291912929211222129, 211192199129121999192121999211919121
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,2
|
|
|
LINKS
| Author?, Source(txt)
P. De Geest, Squares containing at most three distinct digits, Index entries for related sequences
H. Mishima, Squares consisting of 3 different digits
|
|
|
MATHEMATICA
| Flatten[Table[Select[FromDigits/@Tuples[{1, 2, 9}, n], IntegerQ[Sqrt[#]]&], {n, 12}]] (* This program generates only the first 9 terms of the sequence *) (* From Harvey P. Dale, Oct 19 2011 *)
|
|
|
CROSSREFS
| Cf. A053888.
Sequence in context: A050353 A112941 A045976 * A087584 A199139 A138438
Adjacent sequences: A053886 A053887 A053888 * A053890 A053891 A053892
|
|
|
KEYWORD
| nonn,base
|
|
|
AUTHOR
| Patrick De Geest (pdg(AT)worldofnumbers.com), Mar 15 2000.
|
|
|
EXTENSIONS
| More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 04 2005
One more term from Jon E. Schoenfield (jonscho(AT)hiwaay.net), Sep 03 2006
Two more terms from Mishima's webpage added by Max Alekseyev (maxale(AT)gmail.com), Jun 17 2011
|
| |
|
|
