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A034989 Smallest squares starting with a string of n 6's. 1
64, 66049, 6661561, 6666724, 66666207204, 6666662032144, 66666669781156, 666666667972321, 666666666784689561, 66666666662139024481, 66666666666067063944516, 6666666666663510150195841, 66666666666662415539262729, 666666666666660853687280656 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..14.

MATHEMATICA

For[i = 1, i < 20, i++, zeros = 0; isFound = False;

While[ !isFound, low = Ceiling[ Sqrt[ 2/3*(10^i - 1)*10^zeros ] ]; high = Floor[ Sqrt[ (2/3*(10^i - 1) + 1)*10^zeros ] ]; isFound = (low <= high); zeros++ ]; Print[ low, " ", low^2 ] ]

CROSSREFS

Cf. A034988.

Sequence in context: A159677 A013832 A320862 * A187242 A159410 A351781

Adjacent sequences:  A034986 A034987 A034988 * A034990 A034991 A034992

KEYWORD

nonn,base

AUTHOR

Patrick De Geest, Nov 15 1998

EXTENSIONS

Program and more terms from Jonathan Cross (jcross(AT)wcox.com), Oct 15 2001

STATUS

approved

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Last modified June 30 19:43 EDT 2022. Contains 354945 sequences. (Running on oeis4.)