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A108690 Square roots of the terms in A080160. 1
1, 2, 3, 4, 5, 6, 7, 8, 9, 18, 21, 24, 27, 30, 33, 36, 45, 48, 51, 54, 57, 60, 63, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 99, 102, 105, 108, 111, 114, 117, 126, 129, 132, 135, 138, 141, 144, 153, 154, 155, 156, 157, 158, 159, 160 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..64.

MAPLE

b:=n->sum(convert(((10^(n+1)-1)/9)^2, base, 10)[j], j=1..2*n+1): a:=proc(n) if type(sqrt(b(n)), integer)=true then sqrt(b(n)) else fi end:seq(a(n), n=0..2000); # Emeric Deutsch, Jun 19 2005

CROSSREFS

Cf. A080160.

Sequence in context: A032888 A023791 A067043 * A032944 A273736 A048409

Adjacent sequences:  A108687 A108688 A108689 * A108691 A108692 A108693

KEYWORD

nonn,base

AUTHOR

N. J. A. Sloane, Jun 19 2005

EXTENSIONS

More terms from Emeric Deutsch, Jun 19 2005

STATUS

approved

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Last modified August 3 08:10 EDT 2020. Contains 336197 sequences. (Running on oeis4.)