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A074302 Sum of squares of digits of n is equal to the largest prime factor of n. 0
1, 120, 133, 267, 298, 803, 917, 973, 1200, 1316, 1330, 1606, 2023, 2511, 2575, 2669, 2670, 2980, 3312, 6179, 6328, 8030, 8083, 8362, 9170, 9730, 10686, 11256, 12000, 12312, 12862, 12927, 12954, 13160, 13300, 14271, 14514, 14615, 14873, 15272 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..39.

EXAMPLE

298 = 2.'149' and 2^2 + 9^2 + 8^2 = 149.

MATHEMATICA

Select[Range[16000], FactorInteger[#][[-1, 1]]==Total[IntegerDigits[#]^2]&] (* Harvey P. Dale, Sep 20 2013 *)

CROSSREFS

Sequence in context: A030501 A271578 A297152 * A095631 A248662 A259826

Adjacent sequences:  A074299 A074300 A074301 * A074303 A074304 A074305

KEYWORD

base,nonn

AUTHOR

Jason Earls, Sep 21 2002

STATUS

approved

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Last modified December 14 17:41 EST 2019. Contains 329979 sequences. (Running on oeis4.)