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A134845 Smallest number k not divisible by 10 such that k^2 contains exactly n zeros. 13
32, 101, 448, 1001, 10004, 10001, 100004, 100001, 1000004, 1000001, 10000004, 10000001, 100000004, 100000001, 1000000004, 1000000001 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..16.

J. Browkin, Groebner basis.

EXAMPLE

a(1)=32 because 32 is smallest number whose square contains exactly one zero.

CROSSREFS

Cf. A134843, A134844, A134846.

Sequence in context: A228686 A172517 A194645 * A167982 A063498 A173951

Adjacent sequences:  A134842 A134843 A134844 * A134846 A134847 A134848

KEYWORD

nonn

AUTHOR

Artur Jasinski, Nov 13 2007, Nov 16 2007

EXTENSIONS

a(9)-a(16) from Arkadiusz Wesolowski, Jan 19 2013

STATUS

approved

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Last modified July 12 12:18 EDT 2020. Contains 335661 sequences. (Running on oeis4.)