A117723 Numbers for which the product of the digits is the square root of the sum of the digits.

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

Offset

1,3

Links

Table of n, a(n) for n=1..20.

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

Sequence in context: A109383 A281926 A036301 * A359142 A329719 A157662

Adjacent sequences: A117720 A117721 A117722 * A117724 A117725 A117726

Keyword

base,nonn

Author

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

Status

approved