login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A135215 Maximal number of zero digits in square of number with n digits and without zero digits. 5
0, 1, 3, 4, 6, 7, 10, 10, 12, 13, 15 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..11.

MATHEMATICA

(*For a(7) *) mx = 0; Do[Do[Do[Do[Do[Do[Do[k = 10^6b + 10^5q + 10^4r + 10^3p + 10^2s + 10n + m; w = IntegerDigits[k^2]; ile = 0; Do[If[w[[t]] == 0, ile = ile + 1; If[ile > mx, mx = ile]], {t, 1, Length[w]}], {m, 1, 9}], {n, 1, 9}], {s, 1, 9}], {p, 1, 9}], {r, 1, 9}], {q, 1, 9}], {b, 1, 9}]; mx

CROSSREFS

Cf. A134843, A134844, A134845, A134846, A134847, A134848, A134849.

Sequence in context: A131530 A285379 A102093 * A092494 A274429 A050618

Adjacent sequences:  A135212 A135213 A135214 * A135216 A135217 A135218

KEYWORD

nonn,base

AUTHOR

Artur Jasinski, Nov 23 2007

EXTENSIONS

a(8)-a(11) from Lars Blomberg, Jun 26 2011

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 26 00:08 EDT 2020. Contains 334613 sequences. (Running on oeis4.)