|
| |
|
|
A158304
|
|
Numbers n such that n^2 contains no digit bigger than 4.
|
|
4
|
|
|
|
0, 1, 2, 10, 11, 12, 18, 20, 21, 32, 38, 48, 49, 100, 101, 102, 110, 111, 120, 149, 152, 179, 180, 182, 200, 201, 210, 318, 320, 321, 332, 338, 348, 351, 361, 362, 380, 451, 452, 462, 480, 482, 490, 548, 549, 649, 1000, 1001, 1002, 1010, 1011, 1012, 1020
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,3
|
|
|
LINKS
|
Harvey P. Dale, Table of n, a(n) for n = 1..1000
Erich Friedman, What's Special About This Number?
|
|
|
MAPLE
|
Contribution from R. J. Mathar, May 23 2010: (Start)
A158304 := proc(n) option remember; if n= 1 then 0; else for a from procname(n-1)+1 do d := convert(convert(a^2, base, 10), set) ; if max(op(d)) <= 4 then return a; end if; end do; end if; end proc:
seq(A158304(n), n=1..100) ; (End)
|
|
|
MATHEMATICA
|
Select[Range[0, 1100], Max[IntegerDigits[#^2]]<5&] (* Harvey P. Dale, Nov 06 2016 *)
|
|
|
CROSSREFS
|
Cf. A158082, A136810.
Sequence in context: A121717 A217072 A106518 * A007089 A159952 A136820
Adjacent sequences: A158301 A158302 A158303 * A158305 A158306 A158307
|
|
|
KEYWORD
|
nonn,base
|
|
|
AUTHOR
|
N. J. A. Sloane, May 23 2010
|
|
|
EXTENSIONS
|
Extended by several correspondents, May 24 2010
|
|
|
STATUS
|
approved
|
| |
|
|
