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A069645
Define sds(n) = sum of the squares of the digits of n. Sequence gives smaller of two consecutive squares with sds(k^2) = sds((k+1)^2).
1
169, 529, 841, 1681, 24649, 96721, 756900, 833569, 1478656, 1666681, 2972176, 3258025, 3617604, 5405625, 7166329, 8162449, 9721924, 9771876, 12404484, 13184161, 13380964, 13778944, 15776784, 17464041, 19079424, 20034576
OFFSET
0,1
COMMENTS
Is the sequence finite?
LINKS
EXAMPLE
sds(529) = 5^2 + 2^2 + 9^2 = 110 = sds(576) = 25 + 49 + 36.
MATHEMATICA
Flatten[Position[Partition[Total[IntegerDigits[#]^2]&/@(Range[ 5000]^2), 2, 1], _?(First[#]==Last[#]&), {1}, Heads->False]]^2 (* Harvey P. Dale, Jul 10 2014 *)
CROSSREFS
Sequence in context: A327652 A112076 A305055 * A294307 A017534 A120904
KEYWORD
nonn,base
AUTHOR
Amarnath Murthy, Apr 04 2002
EXTENSIONS
More terms from Jason Earls, May 10 2002
STATUS
approved