|
Search: id:A134846
|
|
|
| A134846 |
|
Smallest number k containing no zero digit such that k^2 contains exactly n zeros. |
|
+0
11
|
|
| 32, 245, 448, 3747, 24495, 62498, 248998, 2449552, 6393747, 6244998, 244949995, 498998998, 2449489753
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
COMMENT
|
The corresponding squares are in A134847.
Browkin (see link, p. 29) gives a number without zero digits whose square has 26 zeros: 4472135954999579392819^2 = 20000000000000000000005837591200400708766761. However, he does not claim that it is the smallest such number, so a(26) <= 4472135954999579392819.
|
|
LINKS
|
Jerzy Browkin, Groebner basis (in Polish)
|
|
EXAMPLE
|
a(1) = 32 because 32 is the smallest number without zero digits whose square has exactly one zero: 1024.
|
|
CROSSREFS
|
Cf. A134843, A134844, A134845, A134847.
Adjacent sequences: A134843 A134844 A134845 this_sequence A134847 A134848 A134849
Sequence in context: A050997 A056572 A096960 this_sequence A066392 A097243 A022327
|
|
KEYWORD
|
nonn,base
|
|
AUTHOR
|
Artur Jasinski (grafix(AT)csl.pl), Nov 13 2007
|
|
EXTENSIONS
|
Edited and a(11), a(12), a(13) added by Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Nov 20 2007
|
|
|
Search completed in 0.002 seconds
|
