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A068175
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a(1) = 1; for n>1, a(n) is the smallest square > a(n-1) obtained by inserting digits into a(n-1).
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6
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1, 16, 169, 1369, 13689, 134689, 13446889, 1344468889, 134444688889, 13444446888889, 1344444468888889, 134444444688888889, 13444444446888888889, 1344444444468888888889, 134444444444688888888889
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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EXAMPLE
| a(3) = 169; the smallest square obtained by inserting digits in it is 1369 hence a(4) = 1369.
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CROSSREFS
| A091874 gives square roots.
Sequence in context: A067713 A017210 A067711 * A050628 A048557 A174645
Adjacent sequences: A068172 A068173 A068174 * A068176 A068177 A068178
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KEYWORD
| base,nonn
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Feb 25 2002
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EXTENSIONS
| Corrected and extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Oct 11 2003
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