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A119511 a(n) is the smallest positive integer whose square starts with precisely n identical digits. 9
1, 15, 149, 2357, 10541, 57735, 745356, 1490712, 182574186, 2357022604, 298142397, 7453559925, 1490711985, 10540925533895, 74535599249993, 105409255338946, 7453559924999299, 14907119849998598, 471404520791031683 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Hans Havermann, Table of n, a(n) for n = 1..1000

EXAMPLE

Note that 15^2 = 225 and 149^2 = 22201.

CROSSREFS

Cf. A119998.

Sequence in context: A211847 A055431 A119998 * A023069 A121035 A022739

Adjacent sequences:  A119508 A119509 A119510 * A119512 A119513 A119514

KEYWORD

base,nonn

AUTHOR

Tanya Khovanova, Jul 26 2006

EXTENSIONS

More terms from R. J. Mathar, Jul 29 2006

STATUS

approved

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Last modified May 23 02:46 EDT 2017. Contains 286909 sequences.