|
| |
|
|
A068989
|
|
Squares which when reversed are primes (ignore leading zeros).
|
|
3
| |
|
|
16, 196, 361, 784, 1024, 1369, 1444, 1600, 1681, 3844, 7225, 7921, 9025, 9409, 11236, 14161, 18496, 19321, 19600, 36100, 37249, 38416, 70756, 73441, 75076, 76729, 78400, 78961, 97969, 99856, 102400, 105625, 107584, 109561, 111556, 112225
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
LINKS
| T. D. Noe, Table of n, a(n) for n=1..1000
|
|
|
EXAMPLE
| 1681 = 41^2 becomes 1861, a prime, when its digits are reversed.
|
|
|
MATHEMATICA
| Do[s = i^2; If[PrimeQ[FromDigits[Reverse[IntegerDigits[s]]]], Print[s]], {i, 1, 10^2}]
|
|
|
CROSSREFS
| Cf. primes whose reversal is a square, A007488; numbers n such that n^2 reversed is a prime, A059007.
Sequence in context: A153599 A016280 A077363 * A017318 A173668 A126981
Adjacent sequences: A068986 A068987 A068988 * A068990 A068991 A068992
|
|
|
KEYWORD
| easy,nonn,base
|
|
|
AUTHOR
| Joseph L. Pe (joseph_l_pe(AT)hotmail.com), Mar 12 2002
|
|
|
EXTENSIONS
| More terms from Zak Seidov (zakseidov(AT)yahoo.com), Jan 26 2005
Edited by N. J. A. Sloane (njas(AT)research.att.com), Dec 23 2007
|
| |
|
|
