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 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 (list; graph; refs; listen; history; text; internal format)
 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

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Last modified May 29 22:36 EDT 2024. Contains 372954 sequences. (Running on oeis4.)