|
Search: id:A119378
|
|
|
| A119378 |
|
Palindromic composites such that some digit permutation is prime. |
|
+0
1
|
|
| 121, 232, 272, 292, 323, 343, 434, 494, 575, 616, 737, 767, 818, 838, 878, 949, 959, 979, 10201, 10801, 10901, 11011, 11611, 11711, 11911, 12121, 12221, 12521, 13031, 13231, 13531, 13631, 14041, 14141, 14641, 14941, 15151, 15251, 15751, 15851
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
EXAMPLE
|
121 is composite that have a prime digit permutation: 211.
|
|
MATHEMATICA
|
palQ[n_Integer, base_Integer] := Module[{idn = IntegerDigits[n, base]}, idn == Reverse@idn]; fQ[n_] := Union[PrimeQ /@ FromDigits /@ Permutations@ IntegerDigits@n][[ -1]] == True; Select[Range@15850, !PrimeQ@# && palQ[ #, 10] && fQ@# &] (* Robert G. Wilson v *)
|
|
CROSSREFS
|
Sequence in context: A074730 A037050 A036309 this_sequence A084998 A082944 A131973
Adjacent sequences: A119375 A119376 A119377 this_sequence A119379 A119380 A119381
|
|
KEYWORD
|
base,nonn
|
|
AUTHOR
|
Tanya Khovanova (tanyakh(AT)yahoo.com), Jul 24 2006
|
|
EXTENSIONS
|
More terms from Joshua Zucker (joshua.zucker(AT)stanfordalumni.org) and Robert G. Wilson v (rgwv(at)rgwv.com), Aug 04 2006
|
|
|
Search completed in 0.002 seconds
|
