

A117723


Numbers for which the product of the digits is the square root of the sum of the digits.


1



0, 1, 112, 121, 211, 1111113, 1111131, 1111311, 1113111, 1131111, 1311111, 3111111, 11111111111122, 11111111111212, 11111111111221, 11111111112112, 11111111112121, 11111111112211, 11111111121112, 11111111121121
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OFFSET

1,3


LINKS



EXAMPLE

1111113 is in the sequence because (1)the product of its digits is 1*1*1*1*1*1*3=3,(2)the sum of its digits is 1+1+1+1+1+1+3=9 and 3 is the square root of 9.


CROSSREFS



KEYWORD

base,nonn


AUTHOR

Luc Stevens (lms022(AT)yahoo.com), Apr 13 2006


STATUS

approved



