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A062998
Numbers with property that sum of digits is less than or equal to product of digits.
9
1, 2, 3, 4, 5, 6, 7, 8, 9, 22, 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
OFFSET
1,2
LINKS
MATHEMATICA
Select[Range[100], Total[IntegerDigits[#]]<=Times@@IntegerDigits[#]&] (* Harvey P. Dale, Feb 21 2017 *)
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("b062998.txt", n++, " ", a); if (n==1000, break)) ) } \\ Harry J. Smith, Aug 15 2009
(PARI) is_A062998(n)={normlp(n=digits(n), 1)<=prod(i=1, #n, n[i])} \\ M. F. Hasler, Oct 29 2014
CROSSREFS
Not the same as A037344 (contains 124).
Sequence in context: A083434 A305463 A037344 * A249443 A299690 A318276
KEYWORD
base,nonn,easy
AUTHOR
Henry Bottomley, Jun 29 2001
STATUS
approved