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A080160 Consider those Wonderful Demlo numbers A002477 whose digit sums are squares; sequence gives these digit sums. 5
1, 4, 9, 16, 25, 36, 49, 64, 81, 324, 441, 576, 729, 900, 1089, 1296, 2025, 2304, 2601, 2916, 3249, 3600, 3969, 5184, 5329, 5476, 5625, 5776, 5929, 6084, 6241, 6400, 6561, 6724, 6889, 7056, 7225, 7396, 7569, 7744, 7921, 8100, 9801, 10404, 11025, 11664 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

These are the squares in A080151.

LINKS

Table of n, a(n) for n=1..46.

Eric Weisstein's World of Mathematics, Demlo Number

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 b(n) else fi end: seq(a(n), n=0..2000); # Emeric Deutsch, Jun 19 2005

CROSSREFS

Cf. A002477, A080151, A080161, A080162.

Sequence in context: A077356 A077357 A294497 * A110723 A084617 A179126

Adjacent sequences:  A080157 A080158 A080159 * A080161 A080162 A080163

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 January 18 20:57 EST 2019. Contains 319282 sequences. (Running on oeis4.)