A135215 - OEIS

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A135215

Maximal number of zero digits in square of number with n digits and without zero digits.

0, 1, 3, 4, 6, 7, 10, 10, 12, 13, 15 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,3`
	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: A108654 A131530 A102093 * A092494 A050618 A093579` `Adjacent sequences: A135212 A135213 A135214 * A135216 A135217 A135218`
	KEYWORD	`nonn,base`
	AUTHOR	`Artur Jasinski (grafix(AT)csl.pl), Nov 23 2007`
	EXTENSIONS	`a(8)-a(11) from Lars Blomberg (lars.blomberg(AT)visit.se), Jun 26 2011`

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Last modified February 17 12:38 EST 2012. Contains 206021 sequences.