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A062999
Numbers k with property that the sum of the digits of k is strictly less than the product of the digits of k.
6
23, 24, 25, 26, 27, 28, 29, 32, 33, 34, 35, 36, 37, 38, 39, 42, 43, 44, 45, 46, 47, 48, 49, 52, 53, 54, 55, 56, 57, 58, 59, 62, 63, 64, 65, 66, 67, 68, 69, 72, 73, 74, 75, 76, 77, 78, 79, 82, 83, 84, 85, 86, 87, 88, 89, 92, 93, 94, 95, 96, 97, 98, 99, 124, 125, 126, 127
OFFSET
1,1
LINKS
MATHEMATICA
Select[Range[128], (Plus @@ IntegerDigits[ # ]) < (Times @@ IntegerDigits[ # ]) &] (Alonso del Arte, May 16 2005)
PROG
(PARI) SumD(x)= { s=0; while (x>9, s+=x-10*(x\10); x\=10); return(s + x) } ProdD(x)= { p=1; while (x>9, p*=(x-10*(x\10)); x\=10); return(p*x) } { n=0; for (a=1, 10^9, if (SumD(a) < ProdD(a), write("b062999.txt", n++, " ", a); if (n==1000, break)) ) } \\ Harry J. Smith, Aug 15 2009
KEYWORD
base,nonn
AUTHOR
Henry Bottomley, Jun 29 2001
STATUS
approved